 The air defense mission was changed to a military airlift mission.In 1962, the 111th transitioned from flying air defense missions to flying a large, heavy transport—the Boeing C-97 Stratofreighter, a double-decked, four-engine airplane.In 1963, the 111th ended its 39-year history at Philadelphia Airport and moved to brand new facilities on the north end of the Willow Grove Naval Air Station.