During World War II, a number of Army personnel were stationed at the Orlando Army Air Base and nearby Pinecastle Army Air Field. Some of these servicemen stayed in Orlando to settle and raise families. In 1956, the aerospace and defense company Martin Marietta (now Lockheed Martin) established a plant in the city. Orlando AAB and Pinecastle AAF were transferred to the United States Air Force in 1947 when it became a separate service and were redesignated as air force bases (AFB). In 1958, Pinecastle AFB was renamed McCoy Air Force Base after Colonel Michael N. W. McCoy, a former commander of the 320th Bombardment Wing at the installation, killed in the crash of a B-47 Stratojet bomber north of Orlando. In the 1960s, the base subsequently became home to the 306th Bombardment Wing of the Strategic Air Command, operating B-52 Stratofortress and KC-135 Stratotanker aircraft, in addition to detachment operations by EC-121 and U-2 aircraft.