A Guantanamo Bay detainee who was accused of trying to join the 9/11 hijackers has been sent back to Saudi Arabia for ‘treatment for mental illness,’ the Biden Administration said Monday. Mohammad Mani Ahmad al-Qahtani was sent from the famed prison to the Kingdom of Saudi Arabia where he will receive treatment at a psychiatric facility. “After two decades without trial in U.S. custody, Mohammed will now receive the psychiatric care he has long needed in Saudi Arabia, with the support of his family,” law professor at the City University of New York Ramzi Kassem, who represented al-Qahtani, said. “Keeping...