Human rights — Right to liberty — Aliens — Detention — Detention of aliens outside United States sovereign territory during wartime — Appellant detained at Guantanamo Bay Naval Base in Cuba — Appellant filing habeas petition with District Court challenging his detention — Whether detention lawful — Whether detention lawful under United States law — Whether detention lawful under international law — Whether defect in District Court’s habeas procedure — Boumediene — Procedure due to military detainees challenging their detention in habeas corpus proceedings — Whether District Court improperly admitting hearsay evidence

Relationship of international law and municipal law — International laws of war — Nature — Relevance — Whether source of authority for United States courts — Whether limiting war powers granted by United States statutes — Whether United States statutes intending international laws of war to limit President’s war powers — Powers of Congress

War and armed conflict — Terrorism — Combatants — Attacks on United States on 11 September 2001 — Detention of appellant — Whether detention lawful under United States law — Whether detention authorized by United States statute — Whether appellant falling within original and modified definitions — Whether appellant “part of” or “substantially supporting” Taliban or Al-Qaeda forces or associated forces engaged in hostilities against United States or its coalition partners — Authorization for Use of Force Act 2001 — Detainee Treatment Act 2005 — Military Commissions Acts 2006 and 2009 — Whether appellant falling within scope of President’s statutory detention powers — Determination of limits of President’s war powers — Whether United States Government having authority to detain the appellant — The law of the United States