The man accused of being the mastermind of the Sept. 11 attacks, Khalid Sheikh Mohammed, has agreed to let government ...

Joe Biden vowed to close the U.S. military court and prison at Guantanamo Bay, Cuba, but -- like several presidents before him -- did not succeed. What did he accomplish, and what's next under Trump?

After some initial momentum and a few successes, Biden leaves office like his predecessors, with the prison at Guantánamo Bay ...