Sweetman, Stephen Weiss, et al., Flags Into Battle. Boston: Boston Publishing Company, 1987. Dorr, Robert. Boeing's Cold War Warrior: B-52 Stratofortress. Osprey
May 1963. Earlier that year, the Air Force awarded the General Dynamics company a contract to modify two B-57E Canberras (55-4243, 55-4245) as all-weather