 In 1955 the 71st FIS was re-designated as the 42d Fighter-Interceptor Squadron, the 500th ADG being re designated as the 54th Fighter Group (Air Defense), to honor notable World War II units.In 1947, the PA ANG 112th Fighter Group was formed at Pittsburgh Airport, its origins being the World War II 350th Fighter Group.A component of Air Defense Command, the 146th Fighter Squadron operated various types of interceptors until 1975, when it was re-equipped with A-7D Corsair IIs and became part of Tactical Air Command.