Khalid Sheikh Mohammed, the alleged mastermind of the Sept. 11 attacks, is expected to face a hearing at the Guantanamo prison camp within three months, a military official said Wednesday. Mohammed and 13 other "high-value" detainees recently transferred from CIA custody to the U.S. Navy base at Guantanamo Bay, Cuba will face Combatant Status Review Tribunals, said Navy Capt. Phil Waddingham, director of the Office for the Administrative Review of the Detention of Enemy Combatants.The 14 new detainees will be invited to appear at the hearings, held in a small room inside a prefab building here, which will determine whether they are combatants, Waddingham told reporters. If Mohammed appears, it would mark the first time he has been seen since he was captured more than three years ago. Detainees can refuse to appear but the tribunals will be held regardless, Waddingham said. Army Brig. Gen. Edward A. Leacock, the deputy commander of Guantanamo, said the 14 new detainees are being treated humanely. "They're all adapting well to their new environment," Leacock told reporters here, adding that they're fed three times a day, have recreational opportunities and have opportunities to pray five times per day.