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    PUBLISHED
    

    UNITED STATES COURT OF APPEALS
    

    FOR THE FOURTH CIRCUIT
    

    ------------------------------------------------*

    YASER ESAM HAMDI; ESAM FOUAD

    HAMDI, as next friend of Yaser

    Esam Hamdi,

    Petitioners-Appellees,

    v.

    DONALD RUMSFELD; W. R. PAULETTE,

    Commander,

    Respondents-Appellants.

    CENTER FOR CONSTITUTIONAL RIGHTS;

    RICHARD L. ABEL, Connell Professor

    of Law, University of California at

    Los Angeles; WILLIAM J. ACEVES,

    Professor of Law, California

    Western School of Law; BRUCE A.No. 02-7338
    

    ACKERMAN, Sterling Professor of

    Law & Political Science, Yale

    University; LEE A. ALBERT,

    Professor of Law, University at

    Buffalo Law School, The State

    University of New York; BARBARA

    BADER ALDAVE, Loran L. Stewart

    Professor of Corporate Law,

    University of Oregon School of

    Law; ALICIA ALVAREZ, Clinical

    Associate Professor of Law, DePaul

    University School of Law; DIANE

    MARIE AMANN, Professor of Law,

    University of California, Davis,

    School of Law; MICHELLE J.

    ANDERSON, Associate Professor of

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    Law, Villanova University School

    of Law; FRAN ANSLEY, Professor of

    Law, University of Tennessee

    College of Law; ELVIA R. ARRIOLA,

    Associate Professor of Law,

    Northern Illinois University College

    of Law; FRANK ASKIN, Professor of

    Law and Robert Knowlton Scholar,

    Rutgers School of Law at Newark;

    MILNER S. BALL, Caldwell Professor

    of Constitutional Law, University of

    Georgia School of Law; JON BAUER,

    Clinical Professor of Law and

    Director, Asylum & Human Rights

    Clinic University of Connecticut

    School of Law; PAUL SCHIFF

    BERMAN, Associate Professor,

    University of Connecticut School of

    Law; CYNTHIA BOWMAN, Professor

    of Law, Northwestern University

    School of Law; MARK S. BRODIN,

    Professor of Law, Boston College

    Law School; BARTRAM S. BROWN,

    Professor of Law, Chicago-Kent

    College of Law, Illinois Institute of

    Technology; SUE BRYANT, Director

    of Clinical Education and Associate

    Professor of Law, CUNY School of

    Law; BURTON CAINE, Professor of

    Law, Temple University School of

    Law; EMILY CALHOUN, Professor of

    Law, University of Colorado School

    of Law; ANUPAM CHANDER, Acting

    Professor of Law, University of

    California, Davis, School of Law;

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    2
    

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    ERWIN CHEMERINSKY, Sydney M.

    Irmas Professor of Public Interest

    Law, Legal Ethics and Political

    Science, University of Southern

    California Law School; PAUL G.

    CHEVIGNY, Joel S. and Anne B.

    Ehrenkranz Professor of Law, New

    York University Law School; PAUL

    CHILL, Clinical Professor of Law,

    University of Connecticut School of

    Law; GABRIEL J. CHIN, Rufus King

    Professor of Law, University of

    Cincinnati College of Law; CAROL

    CHOMSKY, Associate Professor of

    Law, University of Minnesota Law

    School; MARGARET CHON, Associate

    Professor of Law, Seattle University

    School of Law; MARJORIE COHN,

    Associate Professor of Law,

    Thomas Jefferson School of Law,

    San Diego; ROBIN MORRIS COLLIN,

    Professor of Law, University of

    Oregon School of Law; DENNIS E.

    CURTIS, Clinical Professor of Law,

    Yale Law School; ERIN DALY,

    Associate Professor of Law,

    Widener University; MICHAEL H.

    DAVIS, Professor of Law, Cleveland

    State University; MICHAEL DEUTSCH,

    Adjunct Professor of Law,

    Northwestern University School of

    Law; LAURA DICKINSON, Associate

    Professor, University of Connecticut

    School of Law; ROBERT DINERSTEIN,

    Associate Dean and Professor of

    ------------------------------------------------*

    3
    

    ------------------------------------------------*

    Law, American University,

    Washington College of Law; JANE

    DOLKART, Associate Professor of

    Law, Dedman School of Law,

    Southern Methodist University;

    SHARON DOLOVICH, Acting Professor

    of Law, University of California at

    Los Angeles; DOUGLAS L. DONOHO,

    Professor of Law, Nova

    Southeastern University, Shepard

    Broad Law Center; DOLORES

    DONOVAN, Professor of Law,

    University of San Francisco School

    of Law; MARY L. DUDZIAK, Judge

    Edward J. and Ruey L. Guirado

    Professor of Law and History,

    University of Southern California

    Law School; Visiting Research

    Scholar, Woodrow Wilson School

    of Public and International Affairs,

    Princeton University; PAMELA

    EDWARDS, Assistant Professor of

    Law, CUNY School of Law; NANCY

    EHRENREICH, Associate Professor of

    Law, University of Denver College

    of Law; ROSA EHRENREICH BROOKS,

    Associate Professor of Law,

    University of Virginia School of

    Law; J. SOFFIYAH ELIJAH, Clinical

    Instructor, Criminal Justice Institute,

    Harvard Law School; SUSAN J.

    FEATHERS, Esq., Director, Public

    Service Program, University of

    Pennsylvania Law School; MARVIN

    FEIN, Associate Professor,

    ------------------------------------------------*

    4
    

    ------------------------------------------------*

    University of Pittsburgh School of

    Law; TODD D. FERNOW, Professor of

    Law, Director, Criminal Clinic,

    University of Connecticut School of

    Law; SALLY FRANK, Professor of

    Law, Drake University School of

    Law; KATHERINE FRANKE, Professor

    of Law, Columbia University; ERIC

    M. FREEDMAN, Professor of Law,

    Hofstra University School of Law;

    NIELS W. FRENZEN, Clinical

    Assistant Professor of Law,

    University of Southern California;

    CRAIG B. FUTTERMAN, Assistant

    Clinical Professor of Law,

    University of Chicago Law School;

    KRISTIN BOOTH GLEN, Dean and

    Professor of Law, CUNY School of

    Law; BRIAN GLICK, Associate

    Clinical Professor of Law, Fordham

    Law School; HOWARD A.

    GLICKSTEIN, Dean and Professor of

    Law, Touro Law School; PHYLLIS

    GOLDFARB, Professor of Law,

    Boston College Law School; BOB

    GOLTEN, Director, International

    Human Rights Advocacy Center,

    University of Denver; CARLOS E.

    GONZALEZ, Associate Professor of

    Law, Rutgers School of Law -

    Newark; Visiting Associate

    Professor of Law, Santa Clara

    University School of Law; KENNETH

    W. GRAHAM, JR., Professor of Law,

    University of California at Los

    Angeles; ARIELA GROSS,

    ------------------------------------------------*

    5
    

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    Professor of Law & History, The

    Law School, University of Southern

    California; LOUISE HALPER, Professor

    of Law, Washington & Lee

    University School of Law; JOEL F.

    HANDLER, Richard C. Maxwell

    Professor of Law and Professor of

    Policy Studies, School of Public

    Policy and Social Research,

    University of California at Los

    Angeles; SIDNEY L. HARRING,

    Professor of Law, CUNY Law

    School; VIRGINIA HENCH, Associate

    Professor of Criminal Law &

    Procedure & Civil Rights,

    University of Hawaii - Manoa;

    KATHY HESSLER, Professor, Case

    Western Reserve University School

    of Law; JUDITH L. HOLMES, Assistant

    Professor of Legal Studies,

    University of Massachusetts -

    Amherst; WYTHE W. HOLT, JR.,

    University Research Professor of

    Law, University of Alabama School

    of Law; JOAN HOWARTH, Professor

    of Law, University of Nevada, Las

    Vegas; MARSHA HUIE, Professor of

    Law, The University of Tulsa

    College of Law; ERIC S. JANUS,

    Professor of Law, William Mitchell

    ------------------------------------------------*

    6
    

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    College of Law; PAULA C. JOHNSON,

    Associate Professor of Law,

    Syracuse University College of

    Law; JOSE R. JUAREZ, JR., Professor

    of Law, St. Mary's University

    School of Law; DAVID KAIRYS,

    James E. Beasley Professor of Law,

    Beasley School of Law, Temple

    University; YALE KAMISAR, Clarence

    Darrow Distinguished University

    Professor of Law, University of

    Michigan; JERRY KANG, Professor of

    Law, University of California at

    Los Angeles; LEWIS R. KATZ, John

    C. Hutchins Professor of Law, Case

    Western Reserve University Law

    School; EILEEN KAUFMAN, Professor

    of Law, Touro Law School;

    MICHAEL J. KELLY, Assistant

    Professor, Creighton University

    School of Law; RANETA LAWSON

    MACK, Professor of Law, Creighton

    University School of Law; DAVID P.

    LEONARD, Professor of Law and

    William M. Rains Fellow, Loyola

    Law School, Los Angeles; JOHN

    LEUBSDORF, Professor of Law,

    Rutgers Law School - Newark;

    MARTIN L. LEVY, Professor,

    Thurgood Marshall School of Law,

    Texas Southern University; JULES

    LOBEL, Professor of Law, University

    of Pittsburgh Law School; DAVID

    LUBAN, Frederick Haas Professor of

    ------------------------------------------------*

    7
    

    ------------------------------------------------*

    Law and Philosophy, Georgetown

    University Law Center; BETH LYON,

    Assistant Professor of Law,

    Villanova University School of

    Law; HOLLY MAGUIGAN, Professor of

    Clinical Law, New York University

    School of Law; SAMUEL A.

    MARCOSSON, Associate Professor,

    Louis D. Brandeis School of Law,

    University of Louisville; GARY M.

    MAVEAL, Associate Professor of

    Law, University of Detroit Mercy

    School of Law; ROBERT F.

    MEAGHER, Emeritus Professor,

    Fletcher School of Law and

    Diplomacy, Tufts University;

    CARLIN MEYER, Professor of Law,

    New York Law School; JONATHAN

    M. MILLER, Professor of Law,

    Southwestern University School of

    Law; MARGARET E. MONTOYA,

    Professor of Law, University of

    New Mexico School of Law;

    BEVERLY MORAN, Professor of Law,

    Professor of Sociology, Vanderbilt

    University School of Law; DAVID A.

    MORAN, Assistant Professor of Law,

    Wayne State University Law

    School; MARY-BETH MOYLAN,

    Instructor of Law, University of the

    Pacific, McGeorge School of Law;

    MILLARD A. MURPHY, Esq., Clinical

    Instructor, Prison Law Clinic,

    University of California, Davis,

    School of Law; KENNETH B. NUNN,

    ------------------------------------------------*

    8
    

    ------------------------------------------------*

    Professor of Law, Fredric G. Levin

    College of Law, University of

    Florida; JAMES P. OGILVY, Associate

    Professor of Law, Columbus School

    of Law, The Catholic University of

    America; NANCY K. OTA, Professor

    of Law, Albany Law School; MARC

    R. POIRIER, Professor of Law, Seton

    Hall Law School; JAMES POPE,

    Professor of Law and Sidney

    Reitman Scholar, Rutgers University

    School of Law; DEBORAH W. POST,

    Professor of Law, Touro Law

    School; WILLIAM QUIGLEY, Professor

    of Law and Director of the Loyola

    Law Clinic & the Gillis Long

    Poverty Law Center, Loyola Law

    School; MARGARET JANE RADIN,

    Wm. Benjamin Scott and Luna M.

    Scott Professor of Law, Stanford

    Law School; MARTHA RAYNER,

    Associate Clinical Professor of Law,

    Fordham University School of Law;

    JUDITH RESNICK, Arthur Liman

    Professor of Law, Yale Law School;

    PAULA R. RHODES, Associate

    Professor of Law, Director, LLM in

    American and Comparative Law

    Program, University of Denver

    College of Law; HENRY J.

    RICHARDSON, III, Peter J. Liacouras

    Professor of Law, Temple Law

    School; ANNELISE RILES,

    ------------------------------------------------*

    9
    

    ------------------------------------------------*

    Professor of Law and Professor of

    Anthropology, Cornell University;

    TONI ROBINSON, Professor of Law,

    Quinnipiac School of Law;

    FLORENCE WAGMAN ROISMAN,

    Professor of Law and Paul Beam

    Fellow, Indiana University School

    of Law-Indianapolis; KERMIT

    ROOSEVELT, Assistant Professor,

    University of Pennsylvania Law

    School; TANINA ROSTAIN, Associate

    Professor, New York Law School;

    JED RUBENFELD, Robert R. Slaughter

    Professor of Law, Yale University;

    DAVID RUDOVSKY, Senior Fellow,

    University of Pennsylvania Law

    School; LEILA NADYA SADAT,

    Professor of Law, Washington

    University in St. Louis; NATSU

    TAYLOR SAITO, Professor of Law,

    Georgia State University College of

    Law; ROBERT F. SEIBEL, Professor of

    Law, CUNY Law School; FRANKLIN

    SIEGEL, City University of New

    York School of Law; ROBERT A.

    SEDLER, Distinguished Professor of

    Law and Gibbs Chair in Civil

    Rights and Civil Liberties, Wayne

    State University; MARCI SEVILLE,

    Associate Professor of Law and

    Director, Women's Employment

    Rights Clinic, Golden Gate

    University School of Law;

    ------------------------------------------------*

    10
    

    ------------------------------------------------*

    MARJORIE SILVER, Professor, Touro

    Law Center; EILEEN SILVERSTEIN,

    Zephaniah Swift Professor of Law,

    University of Connecticut; DAVID

    SLOSS, Assistant Professor of Law,

    Saint Louis University School of

    Law; RONALD C. SLYE, Associate

    Professor, Seattle University School

    of Law; LLOYD B. SNYDER,

    Professor of Law, Cleveland State

    University; ANDREJ THOMAS STARKIS,

    Assistant Professor of Law,

    Massachusetts School of Law;

    NORMAN STEIN, Douglas Arant

    Professor of Law, University of

    Alabama School of Law; JOAN

    STEINMAN, Distinguished Professor

    of Law, Chicago-Kent College of

    Law; ROBERT N. STRASSFELD,

    Professor of Law, Case Western

    Reserve University School of Law;

    ROBERT L. TSAI, Assistant Professor

    of Law, University of Oregon

    School of Law; BETH VAN SCHAACK,

    Assistant Professor, Santa Clara

    University School of Law; DEBORAH

    M. WEISSMAN, Associate Professor

    of Law and Director of Clinical

    Programs, University of North

    Carolina School of Law; CHARLES

    E. WILSON, Associate Professor of

    Law, The Ohio State University

    ------------------------------------------------*

    11
    

    ------------------------------------------------*

    College of Law; RICHARD J. WILSON,

    Professor, Washington College of

    Law, American University; ADAM

    WINKLER, Acting Professor of Law,

    University of California at Los

    Angeles; STEPHEN WIZNER, William

    O. Douglas Clinical Professor of

    Law and Supervising Attorney, Yale

    Law School; MARK E. WOJCIK,

    Associate Professor of Law, The

    John Marshall Law School,

    Chicago; FRANK H. WU, Professor

    of Law, Howard University; CLIFF

    ZIMMERMAN, Clinical Associate

    Professor of Law, Northwestern

    University; NATIONAL LAWYERS'

    GUILD, Heidi Boghosian, Executive

    Director; NATIONAL IMMIGRATION

    PROJECT OF THE NATIONAL LAWYERS

    GUILD, Dan Kesselbrenner,

    Executive Director; NATIONAL

    LAWYERS GUILD NEW YORK CHAPTER,

    Dana Biberman, President; HUMAN

    RIGHTS WATCH, James Ross, Senior

    Legal Counsel; SOUTHERN POVERTY

    LAW CENTER, Rhonda Brownstein,

    Legal Director; UNITARIAN

    UNIVERSALIST SERVICE COMMITTEE,

    Denise Moorehead, Deputy Director

    of Program; PUERTO RICO LEGAL

    DEFENSE AND EDUCATION FUND,

    ------------------------------------------------*

    12
    

    ------------------------------------------------*

    INCORPORATED, Foster Maer, Acting

    Legal Director; NATIONAL

    COALITION TO PROTECT POLITICAL

    FREEDOM, Kit Gage, President; FIRST

    AMENDMENT FOUNDATION, Kit Gage,

    Director; NATIONAL LAWYER'S

    GUILD/MAURICE & JANE SUGAR LAW

    CENTER FOR ECONOMIC & SOCIAL

    JUSTICE, Julie Hurwitz, Executive

    Director; CIVIL LIBERTIES

    MONITORING PROJECT, Jared

    Rossman, President; ASSOCIATION OF

    LEGAL AID ATTORNEYS, U.A.W.

    LOCAL 2325, Michael Letwin,

    Esq., President; PARTNERSHIP FOR

    CIVIL JUSTICE, Mara Verheyden-

    Hilliard, co-founder; TRIAL

    LAWYERS FOR PUBLIC JUSTICE,

    Rebecca Epstein, Staff Attorney;

    FREEDOM SOCIALIST PARTY, Val

    Carlson; JEWISH ALLIANCE FOR

    LAW AND SOCIAL ACTION, Andrew

    M. Fischer; THE INNOCENCE

    PROJECT AT THE BENJAMIN N.

    CARDOZO SCHOOL OF LAW, Nina

    Morrison, Esq., Executive Director;

    ELLA BAKER CENTER FOR HUMAN

    RIGHTS, Van Jones, National

    Executive Director; AMERICAN

    FRIENDS SERVICE COMMITTEE, Mary

    Ellen McNish, General Secretary;

    ------------------------------------------------*

    13
    

    ------------------------------------------------*

    REBER BOULT, Esq., Albuquerque,

    New Mexico; HUNTER GRAY; JOHN

    MAGE, Esq., New York, New York;

    DOUGLAS N. MASTERS, Esq.,

    Chicago, Illinois; LAURA BETH

    NIELSEN, Research Fellow, American

    Bar Foundation; LEONARD

    WEINGLASS, Esq., New York, New

    York; CAMILLE WHITWORTH, Esq.,

    Austin, Texas; MITCHELL

    ZIMMERMAN, Esq., Co-Coordinator,

    Law Professors for the Rule of

    Law; NATIONAL ASSOCIATION OF

    CRIMINAL DEFENSE LAWYERS;

    AMERICAN CIVIL LIBERTIES UNION

    FOUNDATION; AMERICAN CIVIL

    LIBERTIES FOUNDATION OF VIRGINIA;

    Amici Curiae in support

    of Appellees.

    RUTH WEDGWOOD, Professor of Law,

    Yale University Law School;

    SAMUEL ESTREICHER, Professor of

    Law, New York University School

    of Law; DOUGLAS W. KMIEC, Dean

    & St. Thomas More Professor of

    Law, Catholic University; RONALD

    ROTUNDA, George Mason University

    Foundation Professor of Law,

    George Mason University School of

    Law; DAVID B. RIVKIN, JR.; LEE A.

    CASEY; DARIN R. BARTRAM,

    Amici Curiae in support

    of Appellants.

    ------------------------------------------------*

    14
    

    Appeal from the United States District Court
    for the Eastern District of Virginia, at Norfolk.
    Robert G. Doumar, Senior District Judge.
    (CA-02-439-2)
    

    Argued: October 28, 2002
    

    Decided: January 8, 2003
    

    Before WILKINSON, Chief Judge, and WILKINS and
    TRAXLER, Circuit Judges.
    

    ____________________________________________________________

    Reversed and remanded with directions to dismiss by published opin-

    ion. Opinion by WILKINSON, Chief Judge, and WILKINS and

    TRAXLER, Circuit Judges, in which all three concur.

    ____________________________________________________________

    COUNSEL
    

    ARGUED: Paul Clement, Deputy Solicitor General, UNITED

    STATES DEPARTMENT OF JUSTICE, Washington, D.C., for

    Appellants. Frank Willard Dunham, Jr., Federal Public Defender,

    Norfolk, Virginia, for Appellees. ON BRIEF: Paul J. McNulty,

    United States Attorney, Gregory G. Garre, Assistant to the Solicitor

    General, David B. Salmons, Assistant to the Solicitor General, Law-

    rence R. Leonard, Managing Assistant United States Attorney,

    UNITED STATES DEPARTMENT OF JUSTICE, Washington,

    D.C., for Appellants. Larry W. Shelton, Assistant Federal Public

    Defender, Geremy C. Kamens, Assistant Federal Public Defender,

    Norfolk, Virginia, for Appellees. David B. Rivkin, Jr., Lee A. Casey,

    Darin R. Bartram, BAKER & HOSTETLER, L.L.P., Washington,

    D.C., for Amici Curiae Ruth Wedgwood, et al. Shayana Kadidal, Bar-

    bara Olshansky, Michael Ratner, William Goodman, CENTER FOR

    CONSTITUTIONAL RIGHTS, New York, New York, for Amici

    Curiae Center for Constitutional Rights, et al. Steven D. Benjamin,

    Richmond, Virginia; Donald G. Rehkopf, Jr., BRENNA & BRENNA,

    Rochester, New York, for Amicus Curiae Association of Criminal

    15
    

    Defense Lawyers. Steven R. Shapiro, Lucas Guttentag, Arthur N.

    Eisenberg, Robin Goldfaden, AMERICAN CIVIL LIBERTIES

    UNION FOUNDATION, New York, New York; Rebecca K. Glen-

    berg, AMERICAN CIVIL LIBERTIES UNION OF VIRGINIA,

    Richmond, Virginia, for Amici Curiae ACLU, et al.

    ____________________________________________________________

    OPINION
    

    WILKINSON, Chief Judge, and WILKINS and TRAXLER, Circuit

    Judges:

    Yaser Esam Hamdi filed a petition under 28 U.S.C. § 2241 chal-

    lenging the lawfulness of his confinement in the Norfolk Naval Brig.1

    On this third and latest appeal, the United States challenges the dis-

    trict court's order requiring the production of various materials

    regarding Hamdi's status as an alleged enemy combatant. The district

    court certified for appeal the question of whether a declaration by a

    Special Advisor to the Under Secretary of Defense for Policy setting

    forth what the government contends were the circumstances of

    Hamdi's capture was sufficient by itself to justify his detention.

    Because it is undisputed that Hamdi was captured in a zone of active

    combat in a foreign theater of conflict, we hold that the submitted

    declaration is a sufficient basis upon which to conclude that the Com-

    mander in Chief has constitutionally detained Hamdi pursuant to the

    war powers entrusted to him by the United States Constitution. No

    further factual inquiry is necessary or proper, and we remand the case

    with directions to dismiss the petition.

    I.
    

    As recounted in earlier appeals regarding Hamdi's detention,

    Hamdi v. Rumsfeld, 294 F.3d 598 (4th Cir. 2002) ("Hamdi I"), and

    Hamdi v. Rumsfeld, 296 F.3d 278 (4th Cir. 2002) ("Hamdi II"), the

    ____________________________________________________________

    1 The court expresses its appreciation to the Public Defender's Office

    for the Eastern District of Virginia, the United States Attorney's Office

    for the Eastern District of Virginia, and the Solicitor General's Office for

    the professionalism of their efforts throughout these expedited appeals.

    16
    

    al Qaida terrorist network, utilizing commercial airliners, launched

    massive attacks on the United States on September 11, 2001, success-

    fully striking the World Trade Center in New York City, and the Pen-

    tagon, the military headquarters of our country, near Washington,

    D.C. A third unsuccessful attack upon at least one additional target,

    most likely within Washington, D.C., was foiled by the efforts of the

    passengers and crew on the highjacked airliner when it crashed in

    Somerset County, Pennsylvania, southeast of Pittsburgh. In total, over

    3,000 people were killed on American soil that day.

    In the wake of this atrocity, Congress authorized the President "to

    use all necessary and appropriate force against those nations, organi-

    zations, or persons he determines planned, authorized, committed, or

    aided the terrorist attacks" or "harbored such organizations or per-

    sons." Authorization for Use of Military Force, Pub. L. No. 107-40,

    115 Stat. 224 (Sept. 18, 2001). The President responded by ordering

    United States armed forces to Afghanistan to subdue al Qaida and the

    governing Taliban regime supporting it. During this ongoing military

    operation, thousands of alleged enemy combatants, including Hamdi,

    have been captured by American and allied forces.

    The present case arises out of Hamdi's detention by the United

    States military in Norfolk, Virginia. Hamdi apparently was born in

    Louisiana but left for Saudi Arabia when he was a small child.

    Although initially detained in Afghanistan and then Guantanamo Bay,

    Hamdi was transferred to the Norfolk Naval Station Brig after it was

    discovered that he may not have renounced his American citizenship.

    He has remained in Norfolk since April 2002.

    In June 2002, Hamdi's father, Esam Fouad Hamdi, filed a petition

    for writ of habeas corpus, naming as petitioners both Hamdi and him-

    self as next friend.2 The petition alleged that Hamdi is a citizen of the

    United States who was residing in Afghanistan when he was seized

    ____________________________________________________________

    2 This court has previously determined that Esam Fouad Hamdi is a

    proper next friend. Hamdi I, 294 F.3d at 600 n.1. Two earlier petitions

    filed by the Federal Public Defender for the Eastern District of Virginia

    Frank Dunham and Christian Peregrim, a private citizen from New Jer-

    sey, were dismissed. Neither Dunham nor Peregrim had a significant

    relationship with the detainee, and Hamdi's father plainly did. Id. at 606.

    17
    

    by the United States government. According to the petition, "[i]n the

    course of the military campaign, and as part of their effort to over-

    throw the Taliban, the United States provided military assistance to

    the Northern Alliance, a loosely-knit coalition of military groups

    opposed to the Taliban Government," and thereby "obtained access to

    individuals held by various factions of the Northern Alliance." The

    petition further alleges that "Hamdi was captured or transferred into

    the custody of the United States in the Fall of 2001" in Afghanistan,

    transported from Afghanistan to Camp X-Ray at the United States

    Naval Base in Guantanamo Bay, Cuba, in January 2002, and ulti-

    mately transferred to the Norfolk Naval Station Brig in Norfolk, Vir-

    ginia, in April 2002.

    Although acknowledging that Hamdi was seized in Afghanistan

    during a time of active military hostilities, the petition alleges that "as

    an American citizen, . . . Hamdi enjoys the full protections of the

    Constitution," and that the government's current detention of him in

    this country without charges, access to a judicial tribunal, or the right

    to counsel, "violate[s] the Fifth and Fourteenth Amendments to the

    United States Constitution." By way of relief, the petition asks, inter

    alia, that the district court: (1) "Order Respondents to cease all inter-

    rogations of Yaser Esam Hamdi, direct or indirect, while this litiga-

    tion is pending"; (2) "Order and declare that Yaser Esam Hamdi is

    being held in violation of the Fifth and Fourteenth Amendments to the

    United States Constitution"; (3) "To the extent Respondents contest

    any material factual allegations in th[e] Petition, schedule an evidenti-

    ary hearing, at which Petitioners may adduce proof in support of their

    allegations"; and (4) "Order that Petitioner Yaser Esam Hamdi be

    released from Respondents' unlawful custody."

    On June 11, before the government had time to respond to the peti-

    tion, the district court appointed Public Defender Frank Dunham as

    counsel for the detainee and ordered the government to allow the

    Defender unmonitored access to Hamdi. On July 12, we reversed the

    district court's order granting counsel immediate access to Hamdi.

    Hamdi II, 296 F.3d at 279. We cautioned that Hamdi's petition

    involved complex and serious national security issues and found that

    the district court had not shown proper deference to the government's

    legitimate security and intelligence interests. We did not order the

    petition dismissed outright, however, noting our reluctance to "em-

    18
    

    brac[e] [the] sweeping proposition . . . that, with no meaningful judi-

    cial review, any American citizen alleged to be an enemy combatant

    could be detained indefinitely without charges or counsel on the gov-

    ernment's say-so." Id. at 283. Rather, we sanctioned a limited and

    deferential inquiry into Hamdi's status, noting "that if Hamdi is

    indeed an `enemy combatant' who was captured during hostilities in

    Afghanistan, the government's present detention of him is a lawful

    one." Id. (citing Ex parte Quirin, 317 U.S. 1, 31, 37 (1942)). We also

    instructed that, in conducting the inquiry, "the district court must con-

    sider the most cautious procedures first, conscious of the prospect that

    the least drastic procedures may promptly resolve Hamdi's case and

    make more intrusive measures unnecessary." Id. at 284.

    Following this remand, the district court held a hearing on July 18.

    During this hearing, the court expressed its concern over possible vio-

    lations of Hamdi's rights as an American citizen. The court also ques-

    tioned the government's most basic contentions regarding the ongoing

    hostilities, asking "with whom is the war I should suggest that we're

    fighting?" and "will the war never be over as long as there is any

    member [or] any person who might feel that they want to attack the

    United States of America or the citizens of the United States of Amer-

    ica?" The court directed that "[a]ll of these [answers should] be pro-

    vided in the answer that the government is to file to the petition" and

    directed the United States to file such a response to Hamdi's petition

    by July 25.

    On July 25, the government filed a response to, and motion to dis-

    miss, the petition for a writ of habeas corpus. Attached to its response

    was an affidavit from the Special Advisor to the Under Secretary of

    Defense for Policy, Michael Mobbs, which confirms the material fac-

    tual allegations in Hamdi's petition - specifically, that Hamdi was

    seized in Afghanistan by allied military forces during the course of

    the sanctioned military campaign, designated an "enemy combatant"

    by our Government, and ultimately transferred to the Norfolk Naval

    Brig for detention. Thus, it is undisputed that Hamdi was captured in

    Afghanistan during a time of armed hostilities there. It is further

    undisputed that the executive branch has classified him as an enemy

    combatant.

    In addition to stating that Hamdi has been classified as an enemy

    combatant, the Mobbs declaration went on further to describe what

    19
    

    the government contends were the circumstances surrounding

    Hamdi's seizure, his transfer to United States custody, and his place-

    ment in the Norfolk Naval Brig. According to Mobbs, the military

    determined that Hamdi "traveled to Afghanistan in approximately

    July or August of 2001" and proceeded to "affiliate[ ] with a Taliban

    military unit and receive[ ] weapons training." While serving with the

    Taliban in the wake of September 11, he was captured when his Tali-

    ban unit surrendered to Northern Alliance forces with which it had

    been engaged in battle. He was in possession of an AK-47 rifle at the

    time of surrender. Hamdi was then transported with his unit from

    Konduz, Afghanistan to the Northern Alliance prison in Mazar-e-

    Sharif, Afghanistan and, after a prison uprising there, to a prison at

    Sheberghan, Afghanistan. Hamdi was next transported to the U.S.

    short term detention facility in Kandahar, and then transferred again

    to Guantanamo Bay and eventually to the Norfolk Naval Brig.

    According to Mobbs, interviews with Hamdi confirmed the details of

    his capture and his status as an enemy combatant.

    In keeping with our earlier instruction that the district court should

    proceed cautiously in reviewing military decisions reached during

    sanctioned military operations, we directed the district court to first

    "consider the sufficiency of the Mobbs declaration as an independent

    matter before proceeding further." Following this order, the district

    court held a hearing on August 13 to review the sufficiency of the

    Mobbs declaration.

    During this hearing, the district court recognized that "the govern-

    ment is entitled to considerable deference in detention decisions dur-

    ing hostilities." The court also noted that it did not "have any doubts

    [Hamdi] had a firearm [or] any doubts he went to Afghanistan to be

    with the Taliban." Despite these observations, however, the court

    asserted that it was "challenging everything in the Mobbs' declara-

    tion" and that it intended to "pick it apart" "piece by piece." The court

    repeatedly referred to information it felt was missing from the decla-

    ration, asking "Is there anything in here that said Hamdi ever fired a

    weapon?" The court questioned whether Mr. Mobbs was even a gov-

    ernment employee and intimated that the government was possibly

    hiding disadvantageous information from the court.

    The district court filed an opinion on August 16, finding that the

    Mobbs declaration "falls far short" of supporting Hamdi's detention.

    20
    

    The court ordered the government to turn over, among other things,

    copies of Hamdi's statements and the notes taken from any interviews

    with him; the names and addresses of all interrogators who have ques-

    tioned Hamdi; statements by members of the Northern Alliance

    regarding the circumstances of Hamdi's surrender; and a list of the

    date of Hamdi's capture and all of the dates and locations of his sub-

    sequent detention.

    Upon the Government's motion to certify the August 16 production

    order for immediate appeal, the district court certified the following

    question: "Whether the Mobbs Declaration, standing alone, is suffi-

    cient as a matter of law to allow a meaningful judicial review of

    Yaser Esam Hamdi's classification as an enemy combatant?" We then

    granted the Government's petition for interlocutory review pursuant

    to 28 U.S.C.A. § 1292(b). In so doing, we noted that "this court `may

    address any issue fairly included within the certified order because it

    is the order that is appealable, and not the controlling question identi-

    fied by the district court.'" Hamdi v. Rumsfeld, No. 02-7338 (4th Cir.

    Sept. 12, 2002) (order granting petition for interlocutory review)

    (quoting Yamaha Motor Corp. v. Calhoun, 516 U.S. 199, 205 (1996)).

    II.
    

    Yaser Esam Hamdi is apparently an American citizen. He was also

    captured by allied forces in Afghanistan, a zone of active military

    operations. This dual status - that of American citizen and that of

    alleged enemy combatant - raises important questions about the role

    of the courts in times of war.

    A.
    

    The importance of limitations on judicial activities during wartime

    may be inferred from the allocation of powers under our constitu-

    tional scheme. "Congress and the President, like the courts, possess

    no power not derived from the Constitution." Ex parte Quirin, 317

    U.S. 1, 25 (1942). Article I, section 8 grants Congress the power to

    "provide for the common Defence and general Welfare of the United

    States . . . To declare War, grant Letters of Marque and Reprisal, and

    make Rules concerning Captures on Land and Water; To raise and

    support armies . . . [and] To provide and maintain a navy." Article II,

    21
    

    section 2 declares that "[t]he President shall be Commander in Chief

    of the Army and Navy of the United States, and of the Militia of the

    several States, when called into the actual Service of the United

    States."

    The war powers thus invest "the President, as Commander in Chief,

    with the power to wage war which Congress has declared, and to

    carry into effect all laws passed by Congress for the conduct of war

    and for the government and regulation of the Armed Forces, and all

    laws defining and punishing offences against the law of nations,

    including those which pertain to the conduct of war." Quirin, 317

    U.S. at 26. These powers include the authority to detain those cap-

    tured in armed struggle. Hamdi II, 296 F.3d at 281-82.3 These powers

    likewise extend to the executive's decision to deport or detain alien

    enemies during the duration of hostilities, see Ludecke v. Watkins,

    335 U.S. 160, 173 (1948), and to confiscate or destroy enemy prop-

    erty, see Juragua Iron Co. v. United States, 212 U.S. 297, 306 (1909).

    Article III contains nothing analogous to the specific powers of war

    so carefully enumerated in Articles I and II. "In accordance with this

    constitutional text, the Supreme Court has shown great deference to

    the political branches when called upon to decide cases implicating

    sensitive matters of foreign policy, national security, or military

    affairs." Hamdi II, 296 F.3d at 281.

    The reasons for this deference are not difficult to discern. Through

    their departments and committees, the executive and legislative

    branches are organized to supervise the conduct of overseas conflict

    in a way that the judiciary simply is not. The Constitution's allocation

    of the warmaking powers reflects not only the expertise and experi-

    ence lodged within the executive, but also the more fundamental truth

    that those branches most accountable to the people should be the ones

    to undertake the ultimate protection and to ask the ultimate sacrifice

    from them. Thus the Supreme Court has lauded "[t]he operation of a

    ____________________________________________________________

    3 Persons captured during wartime are often referred to as "enemy com-

    batants." While the designation of Hamdi as an "enemy combatant" has

    aroused controversy, the term is one that has been used by the Supreme

    Court many times. See, e.g., Madsen v. Kinsella, 343 U.S. 341, 355

    (1952); In re Yamashita, 327 U.S. 1, 7 (1946); Quirin, 317 U.S. at 31.

    22
    

    healthy deference to legislative and executive judgments in the area

    of military affairs." Rostker v. Goldberg, 453 U.S. 57, 66 (1981).

    The deference that flows from the explicit enumeration of powers

    protects liberty as much as the explicit enumeration of rights. The

    Supreme Court has underscored this founding principle: "The ulti-

    mate purpose of this separation of powers is to protect the liberty and

    security of the governed." Metro. Wash. Airports Auth. v. Citizens for

    the Abatement of Aircraft Noise, Inc., 501 U.S. 252, 272 (1991).

    Thus, the textual allocation of responsibilities and the textual enumer-

    ation of rights are not dichotomous, because the textual separation of

    powers promotes a more profound understanding of our rights. For

    the judicial branch to trespass upon the exercise of the warmaking

    powers would be an infringement of the right to self-determination

    and self-governance at a time when the care of the common defense

    is most critical. This right of the people is no less a right because it

    is possessed collectively.

    These interests do not carry less weight because the conflict in

    which Hamdi was captured is waged less against nation-states than

    against scattered and unpatriated forces. We have emphasized that the

    "unconventional aspects of the present struggle do not make its stakes

    any less grave." Hamdi II, 296 F.3d at 283. Nor does the nature of the

    present conflict render respect for the judgments of the political

    branches any less appropriate. We have noted that the "political

    branches are best positioned to comprehend this global war in its full

    context," id., and neither the absence of set-piece battles nor the inter-

    vals of calm between terrorist assaults suffice to nullify the warmak-

    ing authority entrusted to the executive and legislative branches.

    B.
    

    Despite the clear allocation of war powers to the political branches,

    judicial deference to executive decisions made in the name of war is

    not unlimited. The Bill of Rights which Hamdi invokes in his petition

    is as much an instrument of mutual respect and tolerance as the Four-

    teenth Amendment is. It applies to American citizens regardless of

    race, color, or creed. And as we become a more diverse nation, the

    Bill of Rights may become even more a lens through which we recog-

    23
    

    nize ourselves. To deprive any American citizen of its protections is

    not a step that any court would casually take.

    Drawing on the Bill of Rights' historic guarantees, the judiciary

    plays its distinctive role in our constitutional structure when it reviews

    the detention of American citizens by their own government. Indeed,

    if due process means anything, it means that the courts must defend

    the "fundamental principles of liberty and justice which lie at the base

    of all our civil and political institutions." Powell v. Alabama, 287 U.S.

    45, 67 (1932) (internal quotation marks omitted). The Constitution is

    suffused with concern about how the state will wield its awesome

    power of forcible restraint. And this preoccupation was not acciden-

    tal. Our forebears recognized that the power to detain could easily

    become destructive "if exerted without check or control" by an unre-

    strained executive free to "imprison, dispatch, or exile any man that

    was obnoxious to the government, by an instant declaration that such

    is their will and pleasure." 4 W. Blackstone, Commentaries on the

    Laws of England 349-50 (Cooley ed. 1899) (quoted in Duncan v.

    Louisiana, 391 U.S. 145, 151 (1968)).

    The duty of the judicial branch to protect our individual freedoms

    does not simply cease whenever our military forces are committed by

    the political branches to armed conflict. The Founders "foresaw that

    troublous times would arise, when rulers and people would . . . seek

    by sharp and decisive measures to accomplish ends deemed just and

    proper; and that the principles of constitutional liberty would be in

    peril, unless established by irrepealable law." Ex Parte Milligan, 71

    U.S. (4 Wall.) 2, 120 (1866). While that recognition does not dispose

    of this case, it does indicate one thing: The detention of United States

    citizens must be subject to judicial review. See Hamdi II, 296 F.3d at

    283.

    It is significant, moreover, that the form of relief sought by Hamdi

    is a writ of habeas corpus. In war as in peace, habeas corpus provides

    one of the firmest bulwarks against unconstitutional detentions. As

    early as 1789, Congress reaffirmed the courts' common law authority

    to review detentions of federal prisoners, giving its explicit blessing

    to the judiciary's power to "grant writs of habeas corpus for the pur-

    pose of an inquiry into the cause of commitment" for federal detain-

    ees. Act of Sept. 24, 1789, ch. 20, § 14, 1 Stat. 81-82. While the scope

    24
    

    of habeas review has expanded and contracted over the succeeding

    centuries, its essential function of assuring that restraint accords with

    the rule of law, not the whim of authority, remains unchanged.

    Hamdi's petition falls squarely within the Great Writ's purview, since

    he is an American citizen challenging his summary detention for rea-

    sons of state necessity.

    C.
    

    As the foregoing discussion reveals, the tensions within this case

    are significant. Such circumstances should counsel caution on the part

    of any court. Given the concerns discussed in the preceding sections,

    any broad or categorical holdings on enemy combatant designations

    would be especially inappropriate. We have no occasion, for example,

    to address the designation as an enemy combatant of an American cit-

    izen captured on American soil or the role that counsel might play in

    such a proceeding. See, e.g., Padilla v. Bush, No. 02 Civ. 445

    (MBM), 2002 WL 31718308 (S.D.N.Y. Dec. 4, 2002). We shall, in

    fact, go no further in this case than the specific context before us -

    that of the undisputed detention of a citizen during a combat operation

    undertaken in a foreign country and a determination by the executive

    that the citizen was allied with enemy forces.

    The safeguards that all Americans have come to expect in criminal

    prosecutions do not translate neatly to the arena of armed conflict. In

    fact, if deference to the executive is not exercised with respect to mili-

    tary judgments in the field, it is difficult to see where deference would

    ever obtain. For there is a "well-established power of the military to

    exercise jurisdiction over members of the armed forces, those directly

    connected with such forces, [and] enemy belligerents, prisoners of

    war, [and] others charged with violating the laws of war." Duncan v.

    Kahanamoku, 327 U.S. 304, 313-14 (1946) (footnotes omitted). As

    we emphasized in our prior decision, any judicial inquiry into

    Hamdi's status as an alleged enemy combatant in Afghanistan must

    reflect this deference as well as "a recognition that government has

    no more profound responsibility" than the protection of American cit-

    izens from further terrorist attacks. Hamdi II, 296 F.3d at 283.

    In this regard, it is relevant that the detention of enemy combatants

    serves at least two vital purposes. First, detention prevents enemy

    25
    

    combatants from rejoining the enemy and continuing to fight against

    America and its allies. "The object of capture is to prevent the cap-

    tured individual from serving the enemy. He is disarmed and from

    then on he must be removed as completely as practicable from the

    front . . . ." In re Territo, 156 F.2d 142, 145 (9th Cir. 1946). In this

    respect, "captivity is neither a punishment nor an act of vengeance,"

    but rather "a simple war measure." W. Winthrop, Military Law and

    Precedents 788 (2d ed. 1920). And the precautionary measure of dis-

    arming hostile forces for the duration of a conflict is routinely accom-

    plished through detention rather than the initiation of criminal

    charges. To require otherwise would impose a singular burden upon

    our nation's conduct of war.

    Second, detention in lieu of prosecution may relieve the burden on

    military commanders of litigating the circumstances of a capture half-

    way around the globe. This burden would not be inconsiderable and

    would run the risk of "saddling military decision-making with the

    panoply of encumbrances associated with civil litigation" during a

    period of armed conflict. Hamdi II, 296 F.3d at 283-84. As the

    Supreme Court has recognized, "[i]t would be difficult to devise more

    effective fettering of a field commander than to allow the very ene-

    mies he is ordered to reduce to submission to call him to account in

    his own civil courts and divert his efforts and attention from the mili-

    tary offensive abroad to the legal defensive at home." Johnson v.

    Eisentrager, 339 U.S. 763, 779 (1950).4

    The judiciary is not at liberty to eviscerate detention interests

    directly derived from the war powers of Articles I and II. As the

    nature of threats to America evolves, along with the means of carry-

    ing those threats out, the nature of enemy combatants may change

    also. In the face of such change, separation of powers doctrine does

    ____________________________________________________________

    4 The government has contended that appointment of counsel for

    enemy combatants in the absence of charges would interfere with a third

    detention interest, that of gathering intelligence, by establishing an

    adversary relationship with the captor from the outset. See Hamdi II, 296

    F.3d at 282 (expressing concern that the June 11 order of the district

    court "does not consider what effect petitioner's unmonitored access to

    counsel might have upon the government's ongoing gathering of intelli-

    gence"). That issue, however, is not presented in this appeal.

    26
    

    not deny the executive branch the essential tool of adaptability. To the

    contrary, the Supreme Court has said that "[i]n adopting this flexible

    understanding of separation of powers, we simply have recognized

    Madison's teaching that the greatest security against tyranny . . . lies

    not in a hermetic division among the Branches, but in a carefully

    crafted system of checked and balanced power within each Branch."

    Mistretta v. United States, 488 U.S. 361, 381 (1989). If anything, sep-

    aration of powers bears renewed relevance to a struggle whose

    unforeseeable dangers may demand significant actions to protect

    untold thousands of American lives.

    The designation of Hamdi as an enemy combatant thus bears the

    closest imaginable connection to the President's constitutional

    responsibilities during the actual conduct of hostilities. We therefore

    approach this case with sensitivity to both the fundamental liberty

    interest asserted by Hamdi and the extraordinary breadth of warmak-

    ing authority conferred by the Constitution and invoked by Congress

    and the executive branch.

    III.
    

    After the district court issued its August 16 production order, it

    granted respondent's motion for an interlocutory appeal of that order.

    The following question was certified for our review:

    Whether the Mobbs Declaration, standing alone, is suffi-

    cient as a matter of law to allow a meaningful judicial

    review of Yaser Esam Hamdi's classification as an enemy

    combatant?

    As the Supreme Court has made clear, we are not limited to this

    single question. Rather, an appellate court may address any issue

    fairly included within the certified order, because "it is the order that

    is appealable, and not the controlling question identified by the dis-

    trict court." Yamaha Motor Corp., U.S.A. v. Calhoun, 516 U.S. 199,

    205 (1996) (internal quotation marks omitted).

    On this appeal, it is argued that Hamdi's detention is invalid even

    if the government's assertions were entirely accurate. If that were

    27
    

    clearly the case, there would be no need for further discovery such as

    that detailed in the August 16 production order, because Hamdi's

    detention would be invalid for reasons beyond the scope of any fac-

    tual dispute. Indeed, any inquiry into the August 16 production order

    or any discussion of the certified question would be unnecessary,

    because neither could suffice to justify a detention that, as a threshold

    matter, was otherwise unlawful. Moreover, the burden of the August

    16 order would necessarily outweigh any benefits if, quite indepen-

    dent of the disputed factual issues, Hamdi were already entitled to

    relief. See Fed. R. Civ. Proc. 26(b)(1)-(2). For that reason, any purely

    legal challenges to Hamdi's detention are fairly includable within the

    scope of the certified order. See Juzwin v. Asbestos Corp., 900 F.2d

    686, 692 (3d Cir. 1990) (stating that, on § 1292(b) review of an order

    denying a dispositive motion, an appellate court is "free to consider

    all grounds advanced in support of the grant of [the motion] and all

    grounds suggested for sustaining its denial" (internal quotation marks

    omitted)).

    In this vein, Hamdi and amici have in fact pressed two purely legal

    grounds for relief: 18 U.S.C. § 4001(a) and Article 5 of the Geneva

    Convention. We now address them both.5

    A.
    

    18 U.S.C. § 4001 regulates the detentions of United States citizens.

    It states in full:

    (a) No citizen shall be imprisoned or otherwise detained

    by the United States except pursuant to an Act of

    Congress.

    (b)(1) The control and management of Federal penal and

    correctional institutions, except military or naval

    ____________________________________________________________

    5 We reject at the outset one other claim that Hamdi has advanced in

    abbreviated form. He asserts that our approval of his continued detention

    means that the writ of habeas corpus has been unconstitutionally sus-

    pended. See U.S. Const. art. I, § 9. We find this unconvincing; the fact

    that we have not ordered the relief Hamdi requests is hardly equivalent

    to a suspension of the writ.

    28
    

    institutions, shall be vested in the Attorney General,

    who shall promulgate rules for the government

    thereof, and appoint all necessary officers and

    employees in accordance with the civil-service

    laws, the Classification Act, as amended[,] and the

    applicable regulations.

    (2) The Attorney General may establish and conduct

    industries, farms, and other activities and classify

    the inmates; and provide for their proper govern-

    ment, discipline, treatment, care, rehabilitation, and

    reformation.

    18 U.S.C. § 4001 (2002). Hamdi argues that there is no congressional

    sanction for his incarceration and that § 4001(a) therefore prohibits

    his continued detention. We find this contention unpersuasive.

    Even if Hamdi were right that § 4001(a) requires Congressional

    authorization of his detention, Congress has, in the wake of the Sep-

    tember 11 terrorist attacks, authorized the President to "use all neces-

    sary and appropriate force against those nations, organizations, or

    persons he determines planned, authorized, committed, or aided the

    terrorist attacks" or "harbored such organizations or persons." Autho-

    rization for Use of Military Force, Pub. L. No. 107-40, 115 Stat. 224

    (Sept. 18, 2001) (emphasis added). As noted above, capturing and

    detaining enemy combatants is an inherent part of warfare; the "nec-

    essary and appropriate force" referenced in the congressional resolu-

    tion necessarily includes the capture and detention of any and all

    hostile forces arrayed against our troops. Furthermore, Congress has

    specifically authorized the expenditure of funds for "the maintenance,

    pay, and allowances of prisoners of war [and] other persons in the

    custody of the [military] whose status is determined . . . to be similar

    to prisoners of war." 10 U.S.C. § 956(5) (2002). It is difficult if not

    impossible to understand how Congress could make appropriations

    for the detention of persons "similar to prisoners of war" without also

    authorizing their detention in the first instance.

    Any alternative construction of these enactments would be fraught

    with difficulty. As noted above, the detention of enemy combatants

    serves critical functions. Moreover, it has been clear since at least

    29
    

    1942 that "[c]itizenship in the United States of an enemy belligerent

    does not relieve him from the consequences of [his] belligerency."

    Quirin, 317 U.S. at 37. If Congress had intended to override this well-

    established precedent and provide American belligerents some immu-

    nity from capture and detention, it surely would have made its inten-

    tions explicit.

    It is likewise significant that § 4001(a) functioned principally to

    repeal the Emergency Detention Act. That statute had provided for

    the preventive "apprehension and detention" of individuals inside the

    United States "deemed likely to engage in espionage or sabotage"

    during "internal security emergencies." H.R. Rep. 92-116, at 2 (Apr.

    6, 1971). Proponents of the repeal were concerned that the Emergency

    Detention Act might, inter alia, "permit[ ] a recurrence of the round

    ups which resulted in the detention of Americans of Japanese ancestry

    in 1941 and subsequently during World War II." Id. There is no indi-

    cation that § 4001(a) was intended to overrule the longstanding rule

    that an armed and hostile American citizen captured on the battlefield

    during wartime may be treated like the enemy combatant that he is.

    We therefore reject Hamdi's contention that § 4001(a) bars his deten-

    tion.

    B.
    

    Hamdi and amici also contend that Article 5 of the Geneva Con-

    vention applies to Hamdi's case and requires an initial formal deter-

    mination of his status as an enemy belligerent "by a competent

    tribunal." Geneva Convention Relative to the Treatment of Prisoners

    of War, Aug. 12, 1949, art. 5, 6 U.S.T. 3316, 75 U.N.T.S. 135.

    This argument falters also because the Geneva Convention is not

    self-executing. "Courts will only find a treaty to be self-executing if

    the document, as a whole, evidences an intent to provide a private

    right of action." Goldstar (Panama) v. United States, 967 F.2d 965,

    968 (4th Cir. 1992). The Geneva Convention evinces no such intent.

    Certainly there is no explicit provision for enforcement by any form

    of private petition. And what discussion there is of enforcement

    focuses entirely on the vindication by diplomatic means of treaty

    rights inhering in sovereign nations. If two warring parties disagree

    about what the Convention requires of them, Article 11 instructs them

    30
    

    to arrange a "meeting of their representatives" with the aid of diplo-

    mats from other countries, "with a view to settling the disagreement."

    Geneva Convention, at art. 11. Similarly, Article 132 states that "any

    alleged violation of the Convention" is to be resolved by a joint trans-

    national effort "in a manner to be decided between the interested Par-

    ties." Id. at art. 132; cf. id. at arts. 129-30 (instructing signatories to

    enact legislation providing for criminal sanction of "persons commit-

    ting . . . grave breaches of the present Convention"). We therefore

    agree with other courts of appeals that the language in the Geneva

    Convention is not "self-executing" and does not "create private rights

    of action in the domestic courts of the signatory countries." Huynh

    Thi Anh v. Levi, 586 F.2d 625, 629 (6th Cir. 1978) (applying identical

    enforcement provisions from the Geneva Convention Relative to the

    Protection of Civilian Persons in Time of War, Feb. 2, 1956, 6 U.S.T.

    3516, 75 U.N.T.S. 287); see also Holmes v. Laird, 459 F.2d 1211,

    1222 (D.C. Cir. 1972) (noting that "corrective machinery specified in

    the treaty itself is nonjudicial").

    Hamdi provides no reason to conclude that 28 U.S.C. § 2241

    makes these diplomatically-focused rights enforceable by a private

    right of petition. Indeed, it would make little practical sense for

    § 2241 to have done so, since we would have thereby imposed on the

    United States a mechanism of enforceability that might not find an

    analogue in any other nation. This is not to say, of course, that the

    Geneva Convention is meaningless. Rather, its values are vindicated

    by diplomatic means and reciprocity, as specifically contemplated by

    Article 132. There is a powerful and self-regulating national interest

    in observing the strictures of the Convention, because prisoners are

    taken by both sides of any conflict. This is the very essence of reci-

    procity and, as the drafters of the Convention apparently decided, the

    most appropriate basis for ensuring compliance. As the Court in

    Eisentrager observed about the predecessor to the current Geneva

    Convention, "the obvious scheme of the Agreement [is] that responsi-

    bility for observance and enforcement of these rights is upon political

    and military authorities." 339 U.S. at 789 n.14.

    Even if Article 5 were somehow self-executing, there are questions

    about how it would apply to Hamdi's case. In particular, it is anything

    but clear that the "competent tribunal" which would determine

    Hamdi's status would be an Article III court. Every country has dif-

    31
    

    ferent tribunals, and there is no indication that the Geneva Convention

    was intended to impose a single adjudicatory paradigm upon its signa-

    tories. Moreover, Hamdi's argument begs the question of what kind

    of status determination is necessary under Article 5 and how exten-

    sive it should be. Hamdi and the amici make much of the distinction

    between lawful and unlawful combatants, noting correctly that lawful

    combatants are not subject to punishment for their participation in a

    conflict. But for the purposes of this case, it is a distinction without

    a difference, since the option to detain until the cessation of hostilities

    belongs to the executive in either case. It is true that unlawful comba-

    tants are entitled to a proceeding before a military tribunal before they

    may be punished for the acts which render their belligerency unlaw-

    ful. Quirin, 317 U.S. at 31. But they are also subject to mere detention

    in precisely the same way that lawful prisoners of war are. Id. The

    fact that Hamdi might be an unlawful combatant in no way means that

    the executive is required to inflict every consequence of that status on

    him. The Geneva Convention certainly does not require such treat-

    ment.

    For all these reasons, we hold that there is no purely legal barrier

    to Hamdi's detention. We now turn our attention to the question of

    whether the August 16 order was proper on its own terms.

    IV.
    

    As we will discuss below, we conclude that Hamdi's petition fails

    as a matter of law. It follows that the government should not be com-

    pelled to produce the materials described in the district court's August

    16 order.

    We also note that the order, if enforced, would present formidable

    practical difficulties. The district court indicated that its production

    request might well be only an initial step in testing the factual basis

    of Hamdi's enemy combatant status. The court plainly did not pre-

    clude making further production demands upon the government, even

    suggesting that it might "bring Hamdi before [the court] to inquire

    about [his] statements."

    Although the district court did not have "any doubts [that Hamdi]

    had a firearm" or that "he went to Afghanistan to be with the Tali-

    32
    

    ban," the court ordered the government to submit to the court for in

    camera, ex parte review: (1) "[c]opies of all Hamdi's statements, and

    the notes taken from any interviews with Hamdi, that relate to his rea-

    sons for going to Afghanistan, his activities while in Afghanistan, or

    his participation in the military forces of the Taliban or any other

    organization in that country"; (2) "[a] list of all the interrogators who

    have questioned Hamdi, including their names and addresses, and the

    dates of the interviews"; (3) "[c]opies of any statements by members

    of the Northern Alliance" regarding Hamdi's surrender; (4) "[a] list

    that includes the date of Hamdi's capture, and that gives all the dates

    and locations of his subsequent detention"; (5)"[t]he name and title

    of the individual within the United States Government who made the

    determination that Hamdi was an illegal enemy combatant"; (6) "[t]he

    name and title of the individual within the United States Government

    who made the decision to move Hamdi from Guantanamo Bay, Cuba

    to the Norfolk Naval Station"; and (7) "the screening criteria utilized

    to determine the status of Hamdi." The court's order allows the gov-

    ernment to redact "intelligence matters" from its responses, but only

    to the extent that those intelligence matters are outside the scope of

    inquiry into Hamdi's legal status.

    Hamdi argues vigorously that this order should be affirmed.

    Because of the alleged "breadth with which Respondents construe

    their authority to imprison American citizens whom they consider to

    be enemy combatants," Br. of the Petitioners/Appellees at 27, Hamdi

    argues we must allow the district court to subject the government's

    classification of him to a searching review. While the ordinary § 2241

    proceeding naturally contemplates the prospect of factual develop-

    ment, see 28 U.S.C. §§ 2243, 2246, such an observation only begs the

    basic question in this case - whether further factual exploration

    would bring an Article III court into conflict with the warmaking

    powers of Article I and II. Here, the specific interests asserted by the

    government flow directly from the warmaking powers and are inti-

    mately connected to them. Whatever the general force of these inter-

    ests (which we discussed extensively above), they are most directly

    implicated by captures in a zone of active combat operations.

    A review of the court's August 16 order reveals the risk of "stand[-

    ing] the warmaking powers of Articles I and II on their heads," Hamdi

    II, 296 F.3d at 284. The district court, for example, ordered the gov-

    33
    

    ernment to produce all Hamdi's statements and notes from interviews.

    Yet it is precisely such statements, relating to a detainee's activities

    in Afghanistan, that may contain the most sensitive and the most valu-

    able information for our forces in the field. The risk created by this

    order is that judicial involvement would proceed, increment by incre-

    ment, into an area where the political branches have been assigned by

    law a preeminent role.

    The district court further ordered the government to produce a list

    of all interrogators who have questioned Hamdi, including their

    names and addresses and the dates of the interviews, copies of any

    statements by members of the Northern Alliance regarding Hamdi's

    surrender, and a list that includes the date of Hamdi's capture and all

    the dates and locations of his subsequent detention. Once again, how-

    ever, litigation cannot be the driving force in effectuating and record-

    ing wartime detentions. The military has been charged by Congress

    and the executive with winning a war, not prevailing in a possible

    court case. Complicating the matter even further is the fact that

    Hamdi was originally captured by Northern Alliance forces, with

    whom American forces were generally allied. The district court's

    insistence that statements by Northern Alliance members be produced

    cannot help but place a strain on multilateral efforts during wartime.

    The court also expressed concern in its order that the Northern Alli-

    ance did not "identify the unit [to which Hamdi was affiliated],"

    "where or by whom [Hamdi] received weapons training or the nature

    and extent thereof," or "who commanded the unit or the type of garb

    or uniform Hamdi may have worn. . . ." In demanding such detail, the

    district court would have the United States military instruct not only

    its own personnel, but also its allies, on precise observations they

    must make and record during a battlefield capture.

    Viewed in their totality, the implications of the district court's

    August 16 production order could not be more serious. The factual

    inquiry upon which Hamdi would lead us, if it did not entail disclo-

    sure of sensitive intelligence, might require an excavation of facts

    buried under the rubble of war. The cost of such an inquiry in terms

    of the efficiency and morale of American forces cannot be disre-

    garded. Some of those with knowledge of Hamdi's detention may

    have been slain or injured in battle. Others might have to be diverted

    from active and ongoing military duties of their own. The logistical

    34
    

    effort to acquire evidence from far away battle zones might be sub-

    stantial. And these efforts would profoundly unsettle the constitu-

    tional balance.

    For the foregoing reasons, the court's August 16 production request

    cannot stand.

    V.
    

    The question remains, however, whether Hamdi's petition must be

    remanded for further proceedings or dismissed.

    Hamdi's American citizenship has entitled him to file a petition for

    a writ of habeas corpus in a civilian court to challenge his detention,

    including the military's determination that he is an "enemy comba-

    tant" subject to detention during the ongoing hostilities. Thus, as with

    all habeas actions, we begin by examining the precise allegations

    presented to us by the respective parties. In this case, there are two

    allegations that are crucial to our analysis. First, Hamdi's petition

    alleges that he was a resident of and seized in Afghanistan, a country

    in which hostilities were authorized and ongoing at the time of the

    seizure, but that his continued detention in this country without the

    full panoply of constitutional protections is unlawful. Second, the

    Government's response asserts that Hamdi is being detained pursuant

    to the Commander-in-Chief's Article II war powers and that the cir-

    cumstances underlying Hamdi's detention, as reflected primarily in

    the Mobbs declaration, establish that Hamdi's detention is lawful.

    Generally speaking, in order to fulfill our responsibilities under

    Article III to review a petitioner's allegation that he is being detained

    by American authorities in violation of the rights afforded him under

    the United States Constitution, we must first determine the source of

    the authority for the executive to detain the individual. Once the

    source of the authority is identified, we then look at the justification

    given to determine whether it constitutes a legitimate exercise of that

    authority.

    A.
    

    Here the government has identified the source of the authority to

    detain Hamdi as originating in Article II, Section 2 of the Constitu-

    35
    

    tion, wherein the President is given the war power. We have already

    emphasized that the standard of review of enemy combatant deten-

    tions must be a deferential one when the detainee was captured

    abroad in a zone of combat operations. The President "is best pre-

    pared to exercise the military judgment attending the capture of

    alleged combatants." Hamdi II, 296 F.3d at 283. Thus, in Quirin, the

    Supreme Court stated in no uncertain terms that detentions "ordered

    by the President in the declared exercise of his powers as Commander

    in Chief of the Army in time of war and of grave public danger"

    should not "be set aside by the courts without the clear conviction that

    they are in conflict with the Constitution or laws of Congress consti-

    tutionally enacted." Quirin, 317 U.S. at 25.

    This deferential posture, however, only comes into play after we

    ascertain that the challenged decision is one legitimately made pursu-

    ant to the war powers. It does not preclude us from determining in the

    first instance whether the factual assertions set forth by the govern-

    ment would, if accurate, provide a legally valid basis for Hamdi's

    detention under that power. Otherwise, we would be deferring to a

    decision made without any inquiry into whether such deference is

    due. For these reasons, it is appropriate, upon a citizen's presentation

    of a habeas petition alleging that he is being unlawfully detained by

    his own government, to ask that the government provide the legal

    authority upon which it relies for that detention and the basic facts

    relied upon to support a legitimate exercise of that authority. Indeed,

    in this case, the government has voluntarily submitted - and urged

    us to review - an affidavit from Michael Mobbs, Special Advisor to

    the Under Secretary of Defense for Policy, describing what the gov-

    ernment contends were the circumstances leading to Hamdi's desig-

    nation as an enemy combatant under Article II's war power.

    The Mobbs affidavit consists of two pages and nine paragraphs in

    which Mobbs states that he was "substantially involved with matters

    related to the detention of enemy combatants in the current war

    against the al Qaeda terrorists and those who support and harbor

    them." In the affidavit, Mobbs avers that Hamdi entered Afghanistan

    in July or August of 2001 and affiliated with a Taliban military unit.

    Hamdi received weapons training from the Taliban and remained with

    his military unit until his surrender to Northern Alliance forces in late

    2001. At the time of his capture, Hamdi was in possession of an AK-

    36
    

    47 rifle. After his capture, Hamdi was transferred first from Konduz,

    Afghanistan to the prison in Mazar-e-Sharif, and then to a prison in

    Sheberghan, Afghanistan where he was questioned by a United States

    interrogation team. This interrogation team determined that Hamdi

    met "the criteria for enemy combatants over whom the United States

    was taking control." Hamdi was then transported to the U.S. short

    term detention facility in Kandahar, and then transferred again to

    Guantanamo Bay and eventually to the Norfolk Naval Brig. Accord-

    ing to Mobbs, a subsequent interview with Hamdi confirmed the

    details of his capture and his status as an enemy combatant.

    The district court approached the Mobbs declaration by examining

    it line by line, faulting it for not providing information about whether

    Hamdi had ever fired a weapon, the formal title of the Taliban mili-

    tary unit Hamdi was with when he surrendered, the exact composition

    of the U.S. interrogation team that interviewed Hamdi in Sheberghan,

    and even the distinguishing characteristics between a Northern Alli-

    ance miliary unit and a Taliban military unit. Concluding that the fac-

    tual allegations were insufficient to support the government's

    assertion of the power to detain Hamdi under the war power, the court

    then ordered the production of the numerous additional materials out-

    lined previously. We think this inquiry went far beyond the accept-

    able scope of review.

    To be sure, a capable attorney could challenge the hearsay nature

    of the Mobbs declaration and probe each and every paragraph for

    incompleteness or inconsistency, as the district court attempted to do.

    The court's approach, however, had a signal flaw. We are not here

    dealing with a defendant who has been indicted on criminal charges

    in the exercise of the executive's law enforcement powers. We are

    dealing with the executive's assertion of its power to detain under the

    war powers of Article II. See Eisentrager, 339 U.S. at 793 (Black, J.,

    dissenting) ("[I]t is no `crime' to be a soldier."); cf. In re Winship, 397

    U.S. 358, 363 (1970) (explaining that elevated burden of proof

    applies in criminal cases because of consequences of conviction,

    including social stigma). To transfer the instinctive skepticism, so

    laudable in the defense of criminal charges, to the review of executive

    branch decisions premised on military determinations made in the

    field carries the inordinate risk of a constitutionally problematic intru-

    sion into the most basic responsibilities of a coordinate branch.

    37
    

    The murkiness and chaos that attend armed conflict mean military

    actions are hardly immune to mistake. Yet these characteristics of

    warfare have been with us through the centuries and have never been

    thought sufficient to justify active judicial supervision of combat

    operations overseas. To inquire, for example, whether Hamdi actually

    fired his weapon is to demand a clarity from battle that often is not

    there. The district court, after reviewing the Mobbs affidavit, did not

    "have any doubts [Hamdi] had a firearm [or] any doubts he went to

    Afghanistan to be with the Taliban." To delve further into Hamdi's

    status and capture would require us to step so far out of our role as

    judges that we would abandon the distinctive deference that animates

    this area of law.

    For these reasons, and because Hamdi was indisputably seized in

    an active combat zone abroad, we will not require the government to

    fill what the district court regarded as gaps in the Mobbs affidavit.

    The factual averments in the affidavit, if accurate, are sufficient to

    confirm that Hamdi's detention conforms with a legitimate exercise

    of the war powers given the executive by Article II, Section 2 of the

    Constitution and, as discussed elsewhere, that it is consistent with the

    Constitution and laws of Congress. See Quirin, 317 U.S. at 25. Ask-

    ing the executive to provide more detailed factual assertions would be

    to wade further into the conduct of war than we consider appropriate

    and is unnecessary to a meaningful judicial review of this question.

    B.
    

    We turn then to the question of whether, because he is an American

    citizen currently detained on American soil by the military, Hamdi

    can be heard in an Article III court to rebut the factual assertions that

    were submitted to support the "enemy combatant" designation. We

    hold that no evidentiary hearing or factual inquiry on our part is nec-

    essary or proper, because it is undisputed that Hamdi was captured in

    a zone of active combat operations in a foreign country and because

    any inquiry must be circumscribed to avoid encroachment into the

    military affairs entrusted to the executive branch.

    In support of its contention that no further factual inquiry is appro-

    priate, the government has argued that a "some evidence" standard

    should govern the adjudication of claims brought by habeas petition-

    38
    

    ers in areas where the executive has primary responsibility. That stan-

    dard has indeed been employed in contexts less constitutionally

    sensitive than the present one, albeit in a procedural posture that ren-

    ders those cases distinguishable. See, e.g., INS v. St. Cyr, 533 U.S.

    289, 306 (2001) (describing historical practice under which, so long

    as "there was some evidence to support" a deportation order, habeas

    courts would not "review factual determinations made by the Execu-

    tive"); Eagles v. Samuels, 329 U.S. 304, 312 (1946); Fernandez v.

    Phillips, 268 U.S. 311, 312 (1925). In each of these cases, the Court

    indicated that the role of the writ is not to correct "mere error" in the

    executive's exercise of a discretionary power, but rather to check the

    executive branch if it asserts a "power to act beyond the authority

    granted." Eagles, 329 U.S. at 311-12. Thus, the government asserts,

    the role of a habeas court is not to reconsider the executive's decision,

    but rather only to confirm that "there was some basis for the chal-

    lenged executive determination." Br. for Respondents-Appellants at

    29. Once that determination is made, the government further asserts,

    the detainee may not offer any rebuttal evidence and no further fac-

    tual inquiry is allowed.

    It is not necessary for us to decide whether the "some evidence"

    standard is the correct one to be applied in this case because we are

    persuaded for other reasons that a factual inquiry into the circum-

    stances of Hamdi's capture would be inappropriate.

    1.
    

    As we have emphasized throughout these appeals, we cannot set

    aside executive decisions to detain enemy combatants "without the

    clear conviction that they are in conflict with the Constitution or laws

    of Congress constitutionally enacted." Quirin, 317 U.S. at 25. We

    cannot stress too often the constitutional implications presented on the

    face of Hamdi's petition. The constitutional allocation of war powers

    affords the President extraordinarily broad authority as Commander

    in Chief and compels courts to assume a deferential posture in

    reviewing exercises of this authority. And, while the Constitution

    assigns courts the duty generally to review executive detentions that

    are alleged to be illegal, the Constitution does not specifically con-

    template any role for courts in the conduct of war, or in foreign policy

    generally.

    39
    

    Indeed, Article III courts are ill-positioned to police the military's

    distinction between those in the arena of combat who should be

    detained and those who should not. Any evaluation of the accuracy

    of the executive branch's determination that a person is an enemy

    combatant, for example, would require courts to consider, first, what

    activities the detainee was engaged in during the period leading up to

    his seizure and, second, whether those activities rendered him a com-

    batant or not. The first question is factual and, were we called upon

    to delve into it, would likely entail substantial efforts to acquire evi-

    dence from distant battle zones. See Eisentrager, 339 U.S. at 779. The

    second question may require fine judgments about whether a particu-

    lar activity is linked to the war efforts of a hostile power - judg-

    ments the executive branch is most competent to make.

    Hamdi's petition places him squarely within the zone of active

    combat and assures that he is indeed being held in accordance with

    the Constitution and Congressional authorization for use of military

    force in the wake of al Qaida's attack. Quirin, 317 U.S. at 25. Any

    effort to ascertain the facts concerning the petitioner's conduct while

    amongst the nation's enemies would entail an unacceptable risk of

    obstructing war efforts authorized by Congress and undertaken by the

    executive branch.

    2.
    

    Hamdi contends that, although international law and the laws of

    this country might generally allow for the detention of an individual

    captured on the battlefield, these laws must vary in his case because

    he is an American citizen now detained on American soil. As an

    American citizen, Hamdi would be entitled to the due process protec-

    tions normally found in the criminal justice system, including the

    right to meet with counsel, if he had been charged with a crime. But

    as we have previously pointed out, Hamdi has not been charged with

    any crime. He is being held as an enemy combatant pursuant to the

    well-established laws and customs of war. Hamdi's citizenship right-

    fully entitles him to file this petition to challenge his detention, but

    the fact that he is a citizen does not affect the legality of his detention

    as an enemy combatant.

    Indeed, this same issue arose in Quirin. In that case, petitioners

    were German agents who, after the declaration of war between the

    40
    

    United States and the German Reich, were trained at a German sabo-

    tage school where they "were instructed in the use of explosives and

    in methods of secret writing." Quirin, 317 U.S. at 21. The petitioners

    then journeyed by submarine to the beaches of New York and Florida,

    carrying large quantities of explosives and other sabotage devices. All

    of them were apprehended by FBI agents, who subsequently learned

    of their mission to destroy war industries and facilities in the United

    States. All of the petitioners were born in Germany but had lived in

    the United States at some point. One petitioner claimed American cit-

    izenship by virtue of the naturalization of his parents during his youth.

    The Court, however, did not need to determine his citizenship because

    it held that the due process guarantees of the Fifth and Sixth Amend-

    ments were inapplicable in any event. It noted that"[c]itizenship in

    the United States of an enemy belligerent does not relieve him from

    the consequences of a belligerency which is unlawful." Id. at 37. The

    petitioner who alleged American citizenship was treated identically to

    the other German saboteurs.

    The Quirin principle applies here. One who takes up arms against

    the United States in a foreign theater of war, regardless of his citizen-

    ship, may properly be designated an enemy combatant and treated as

    such. The privilege of citizenship entitles Hamdi to a limited judicial

    inquiry into his detention, but only to determine its legality under the

    war powers of the political branches. At least where it is undisputed

    that he was present in a zone of active combat operations, we are sat-

    isfied that the Constitution does not entitle him to a searching review

    of the factual determinations underlying his seizure there.

    3.
    

    Similarly, we reject Hamdi's argument that even if his initial deten-

    tion in Afghanistan was lawful, his continuing detention on American

    soil is not. Specifically, Hamdi contends that his petition does not

    implicate military concerns because "the underlying claims in this

    case are designed to test the legality of Hamdi's imprisonment in a

    naval brig in Norfolk, Virginia, not a military determination made

    overseas on the basis of caution rather than accuracy." Br. of the Peti-

    tioners/Appellees at 44. But the fact that Hamdi is presently being

    detained in the United States - as opposed to somewhere overseas

    - does not affect the legal implications of his status as an enemy

    41
    

    combatant. For the same reason that courts are ill-positioned to

    review the military's distinction between those who should or should

    not be detained in an arena of combat, courts are not in the position

    to overturn the military's decision to detain those persons in one loca-

    tion or another. It is not clear why the United States should be pre-

    cluded from exercising its discretion to move a detainee to a site

    within this country, nor do we see what purpose would be served by

    second guessing the military's decision with respect to the locus of

    detention.

    4.
    

    To conclude, we hold that, despite his status as an American citizen

    currently detained on American soil, Hamdi is not entitled to chal-

    lenge the facts presented in the Mobbs declaration. Where, as here,

    a habeas petitioner has been designated an enemy combatant and it is

    undisputed that he was captured in a zone of active combat operations

    abroad, further judicial inquiry is unwarranted when the government

    has responded to the petition by setting forth factual assertions which

    would establish a legally valid basis for the petitioner's detention.

    Because these circumstances are present here, Hamdi is not entitled

    to habeas relief on this basis.

    C.
    

    Finally, we address Hamdi's contention that even if his detention

    was at one time lawful, it is no longer so because the relevant hostili-

    ties have reached an end. In his brief, Hamdi alleges that the govern-

    ment "confuses the international armed conflict that allegedly

    authorized Hamdi's detention in the first place with an on-going fight

    against individuals whom Respondents refuse to recognize as `bellig-

    erents' under international law." Id. at 53-54. Whether the timing of

    a cessation of hostilities is justiciable is far from clear. See Ludecke,

    335 U.S. at 169 ("Whether and when it would be open to this Court

    to find that a war though merely formally kept alive had in fact ended,

    is a question too fraught with gravity even to be adequately formu-

    lated when not compelled."). The executive branch is also in the best

    position to appraise the status of a conflict, and the cessation of hostil-

    ities would seem no less a matter of political competence than the ini-

    tiation of them. See United States v. The Three Friends, 166 U.S. 1,

    42
    

    63 (1897) ("[I]t belongs to the political department to determine when

    belligerency shall be recognized, and its action must be accepted

    according to the terms and intention expressed."). In any case, we

    need not reach this issue here. The government notes that American

    troops are still on the ground in Afghanistan, dismantling the terrorist

    infrastructure in the very country where Hamdi was captured and

    engaging in reconstruction efforts which may prove dangerous in

    their own right. Because under the most circumscribed definition of

    conflict hostilities have not yet reached their end, this argument is

    without merit.

    VI.
    

    It is important to emphasize that we are not placing our imprimatur

    upon a new day of executive detentions. We earlier rejected the sum-

    mary embrace of "a sweeping proposition - namely that, with no

    meaningful judicial review, any American citizen alleged to be an

    enemy combatant could be detained indefinitely without charges or

    counsel on the government's say-so." Hamdi II, 296 F.3d at 283. But,

    Hamdi is not "any American citizen alleged to be an enemy comba-

    tant" by the government; he is an American citizen captured and

    detained by American allied forces in a foreign theater of war during

    active hostilities and determined by the United States military to have

    been indeed allied with enemy forces.

    Cases such as Hamdi's raise serious questions which the courts will

    continue to treat as such. The nation has fought since its founding for

    liberty without which security rings hollow and for security without

    which liberty cannot thrive. The judiciary was meant to respect the

    delicacy of the balance, and we have endeavored to do so.

    The events of September 11 have left their indelible mark. It is not

    wrong even in the dry annals of judicial opinion to mourn those who

    lost their lives that terrible day. Yet we speak in the end not from sor-

    row or anger, but from the conviction that separation of powers takes

    on special significance when the nation itself comes under attack.

    Hamdi's status as a citizen, as important as that is, cannot displace our

    constitutional order or the place of the courts within the Framer's

    scheme. Judicial review does not disappear during wartime, but the

    review of battlefield captures in overseas conflicts is a highly deferen-

    43
    

    tial one. That is why, for reasons stated, the judgment must be

    reversed and the petition dismissed. It is so ordered.

    44
    

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