WASHINGTON—In its first major hearing on the use of abusive interrogation tactics at Guantánamo Bay, a blue-ribbon panel found detainee Omar Khadr mentally unfit to testify about his years of psychological torture. "Because of Mr. Khadr's fragile state due to unknown hours spent under the most brutal, mentally straining conditions, he cannot be trusted to speak competently on his own behalf," said Rep. Kit Bond (R-MO), the panel's chairman. "It is unfortunate that someone with such intimate knowledge of the horrors of waterboarding, stress positions, and induced hypothermia is so emotionally unstable. He bursts into tears at even the mention of mock torture." Bond added that Khadr's confession of planning 9/11, the London train bombings, and the Iranian hostage crisis would be kept on the record.