The Douglas C-124 Globemaster II, nicknamed "Old Shaky", is a retired American heavy-lift cargo aircraft built by the Douglas Aircraft Company. It was retired in favor of its conterpart, the C-17 Globe master III. First deliveries of the 448 production aircraft began in May 1950 and continued until 1955. The C-124 was operational during the Korean War, and was also used to assist supply operations for Operation Deep Freeze in Antarctica. The Military Air Transport Service (MATS) was the primary operator until January 1966, when the organization was retitled Military Airlift Command (MAC). Within a few years following the formation of MAC, the last remaining examples of the C-124 were transferred to the Air Force Reserve