Newly unsealed documents give one of the most detailed views yet of the evidence gathered on the accused 9/11 mastermind ...

It will be her first visit to the United States on 9/11 in three years ... It was late at night in Japan, and she took the family dog for a walk. She asked the canine, “Is Toshiya-kun OK?” ...

In a highly unusual legal move, the Justice Department has asked a federal appeals court to stop alleged 9/11 mastermind Khalid Sheikh Mohammad from pleading guilty this Friday at Guantánamo-- even ...

WATCH: What’s in the plea deal reached with key 9/11 attack conspirators The decision puts back on track the agreements that would have the three men plead guilty to one of the deadliest attacks ...