The 20th Attack Squadron is a United States Air Force unit, based at Whiteman Air Force Base, Missouri. It currently flies the General Atomics MQ-9 Reaper and is assigned to the 432d Wing at Creech Air Force Base, Nevada. It was originally activated as the 20th Transport Squadron in 1940 and served as a troop carrier unit in Panama during and after World War II, until it was inactivated in 1949. The unit was redesignated as the 20th Reconnaissance Squadron and its reactivation at Whiteman took place on 14 January 2011. In May 2016, it was redesignated the 20th Attack Squadron