F-35A Lightning II fighter jets from Hill Air Force Base, Utah, taxi during Red Flag 19-1 at Nelllis Air Force Base, Nevada, Feb. 6, 2019. Pilots and maintainers from the 388th Fighter Wing and 419th Fighter Wing spent three weeks at Red Flag, the Air Force's premier combat exercise that includes units from across the Air Force and allied nations. (U.S. Air Force photo by R. Nial Bradshaw)