The first Eagle entered service in November 1974 with the 58th Tactical Training Wing at Luke Air Force Base, Ariz. The first Air Force air defense squadron to transition to the F-15 was the 48th Fighter-Interceptor Squadron at Langley Air Force Base, Va., in January 1982. By 1989, more than 1,200 Eagles were in service; most were built by McDonnell Douglas in St. Louis, Mo., and more than 110 were built by Mitsubishi of Japan.