In his opening statement earlier Tuesday, the lead prosecutor contended that Hamdan had learned details of the Sept. 11 attacks, including the intended target of the fourth hijacked plane, which crashed in a Pennsylvania field.

"Virtually no one knew the intended target, but the accused knew," Navy Lt. Cmdr. Timothy Stone told the court, saying Hamdan had admitted to interrogators that he overheard Bin Laden and Ayman Zawahiri talking about attack plans while he drove them. But chief prosecutor Army Col. Lawrence Morris indicated at a news conference later that the eavesdropping occurred after Sept. 11, not before.