Hamdan's lawyer said in opening statements that the Yemeni, held for nearly seven years before his trial, was just a paid employee of the fugitive al Qaeda leader, a driver in the motor pool who never joined the militant group or plotted attacks on America.
But prosecutor Timothy Stone told the six-member jury of U.S. military officers who will decide Hamdan's guilt or innocence that Hamdan had inside knowledge of the 2001 attacks on the United States because he overheard a conversation between bin Laden and his deputy, Ayman al-Zawahiri.
"If they hadn't shot down the fourth plane it would've hit the dome," Stone, a Navy officer, said in his opening remarks.
The tribunal's chief prosecutor, Col. Lawrence Morris, later explained that Stone was quoting Hamdan in evidence that will be presented at trial. Morris declined to say if the "dome" was a reference to the U.S. Capitol.