B-1B Lancers assigned to the 28th Bomb Wing at Ellsworth Air Force Base, S.D., leave the parking apron of the flight line, Jan. 22, 2020. Aircrews and B-1s from the 37th Bomb Squadron launched for Red Flag 20-1, a two-week advanced aerial combat training exercise held several times a year by the U.S. Air Force. (U.S. Air Force photo by Staff Sgt. Hailey Staker)