 He was awarded his pilot's wings upon his graduation from flight training.After completing multi-engine flight training in November 1946, Allen was assigned to Strategic Air Command's 7th Bombardment Group at Carswell Air Force Base, Texas, where he flew B-29 Superfortress bombers, and then the new and very long-range Convair B-36 bomber.Allen also served in various technical positions in the area of nuclear weapons.