Saudi Arabia will withdraw 21 cadets receiving military training in the United States.<br />This is following a U.S. investigation into a Saudi officer’s fatal shooting of three Americans.<br />The stabbing happened at a Florida naval base that U.S. Attorney General William Barr branded an act of terrorism.<br />The Dec. 6 attack further complicated U.S.-Saudi relations at a time of heightened tensions.<br />Reuters reports that Iran is Saudi Arabia’s regional rival.