Alleged 9/11 terror attacks mastermind Khalid Mohammed will stand trial on June 5, 2028, more than 25 years after the attack. A military judge ruled the trial would start in two years because a 2027 date sought by prosecutors was too soon. Mohammed, who has previously said he planned 2001's "9/11 operation, was arrested in 2003 and has been held at Guantanamo Bay since September 2006.