Three men have been held in the United States as "enemy combatants" since the Sept. 11, 2001, attacks. Here are details of their cases:

Ali Saleh Kahlah al-Marri, a Qatari national, is the only person currently being held in the United States as an enemy combatant. A federal appeals court on Monday ruled the U.S. military cannot indefinitely detain al-Marri, who has been held in a U.S. Navy brig in Charleston, South Carolina, for about four years without charges. The court ordered him released from military custody.

Al-Marri entered the country on Sept. 10, 2001. U.S. government officials have said al-Marri was tasked with helping al Qaeda operatives planning a second wave of attacks.

Source Reuters