During World War II, the United States Army Air Forces (USAAF) established numerous airfields in Florida for antisubmarine defense in the western Atlantic and Gulf of Mexico and for training pilots and aircrews of USAAF fighters, attack planes, and light and medium bombers. After early 1944, heavy bomber crews also trained in the State. However two major operations in Florida were the School of Applied Tactics and the air Proving Grounds which tested and developed new capabilities. Most of these airfields were under the command of Third Air Force, the AAF Antisubmarine Command (AAFAC), or the Army Air Forces Training Command (AAFTC), the latter being the predecessor of the current-day United States Air Force's Air Education and Training Command (AETC). The 26th Antisubmarine Wing was headquartered in Miami. It controlled about forty percent of the AAFAC squadrons. However the other USAAF support commands, Air Technical Service Command (ATSC) and Air Transport Command (ATC) or Troop Carrier Command, also commanded a significant number of airfields in a support roles. It is still possible to find remnants of these wartime airfields as most were converted into municipal airports, while others transitioned to the newly established United States Air Force in 1947. Two remained as active USAF installations until 1960 and a third until 1962, at which time they, too, were converted into purely civilian airports, the latter as a commercial airport. A fourth became a joint civil-military commercial airport hosting a Florida Air National Guard fighter-interceptor group until 1968 when the airport was permanently closed and replaced by a newly constructed international airport and concurrently constructed Air National Guard base also hosting the same Air National Guard fighter-interceptor group which today is a full fighter wing. A fifth airfield remained as an active Strategic Air Command (SAC) bomber, tanker and reconnaissance base with a tenant Aerospace Defense Command (ADC) air command and control squadron. The base later incorporating a commercial jetport and became a joint civil-military airport in 1962 until the closure of the USAF installation in 1975 and its conversion to a civilian commercial international airport in 1976. A sixth airfield remained as an active Tactical Air Command (TAC), then Air Combat Command (ACC), fighter base until 1995, hosting an active ACC fighter wing, a collocated Air Force Reserve (AFRES) fighter wing, a collocated AFRES rescue squadron, and a TAC-gained Florida Air National Guard (FLANG) fighter alert detachment/operating location. Having been