A U.S. Court of Appeals for the District of Columbia Circuit panel upheld then-defense secretary Lloyd Austin’s withdrawal from terms with Khalid Sheikh Mohammed and two others charged in the 9/11 attacks.

A U.S. appeals court on Friday refused to allow Khalid Sheikh Mohammed, the accused mastermind of the September 11, 2001, attacks, and two of his co-defendants to plead guilty under agreements that w...

The decision by a panel of the federal appeals court in Washington, D.C., undoes an attempt to wrap up more than two decades of military prosecution beset by legal and logistical troubles.