Canadian citizen Omar Khadr, now 23, is accused of throwing a grenade that killed a US soldier during a gun battle in Afghanistan in 2002, when he was 15.

BBC: Youngest Guantanamo inmate, Canadian Omar Khadr, tried

The other two, Omar Khadr, a Canadian accused of killing an American soldier in Afghanistan, and Salim Ahmed Hamdan, Osama bin Laden's former Yemeni driver, are likely to go on trial later this summer.

ECONOMIST: The ��legal black hole�� defies attacks

Omar Khadr, a Canadian citizen charged with the death of Army Sergeant First Class Christopher Speer in Afghanistan by tossing a hand grenade in a July 2002 fire fight, has been controversial since his capture.

CENTERFORSECURITYPOLICY: Center For Security Policy