A military appeals court has ruled against Defense Secretary Lloyd Austin’s effort to throw out the plea deals reached for Khalid Sheikh Mohammed and two other defendants in the 9/11 attacks, a U.S. official said.

The decision puts back on track the agreements that would have the three men plead guilty to one of the deadliest attacks on the United States in exchange for being spared the possibility of the death penalty. The attacks by al-Qaida killed nearly 3,000 people on Sept. 11, 2001, and helped spur U.S. invasions of Afghanistan and Iraq in what the George W. Bush administration called its war on terror.