United States v. Khalid Sheikh Mohammed

September 11: The ‘Mastermind’ behind the terrorist attacks to plead guilty 23 years later

Khalid Sheikh Mohammed, the Pakistani national characterized as the mastermind behind the September 11, 2001, attacks on New York and the Pentagon, was arrested in 2003 and transferred to the U.S. military prison at Guantanamo Bay, where he has been held since 2006.