This was an amicus brief on behalf of members of UK Parliament: A landmark United States Supreme Court decision established the U.S. court system has the authority to decide whether foreign nationals (non-U.S. citizens) held in Guantanamo Bay were rightfully imprisoned and that detainees are entitled to challenge their detention. The detainees had been designated enemy combatants and did not have access to counsel, the right to a trial or knowledge of the charges against them. The Supreme Court, over the administration’s objections, agreed in November 2003 to hear the cases of the Guantánamo detainees, namely Rasul v Bush and al Odah v. Bush. The arguments were heard on April 20, 2004. In a ruling on June 28th 2004, the Court ruled In this appeal the that the United States Constitution entitled detainees the right to file habeas corpus petitions in federal district court.