In this undated image from television, a man who claims to be an American and who a U.S. official said identified himself as John Walker, is held in the custody of U.S. forces in Afghanistan after being discovered among captured Taliban troops and al-Qaida fighters. The man was among survivors of the fortress prison revolt driven from tunnels flooded by the northern alliance. CNN reported that Walker, a convert to Islam, had suffered grenade and bullet wounds. Newsweek said Walker had identified himself as Abdul Hamid. In an interview posted on Newsweek magazine's Web site Sunday night, his parents identified him from photos as John Philip Walker Lindh, 20, of Fairfax, Calif. (AP Photo/CNN)