Photo Mapping Flight (RB-17) At that time, the combat units of the FEAF were equipped with the Lockheed F-80 Shooting Star jet fighter, the North American F-82 Twin Mustang all-weather escort fighter, the Douglas B-26 Invader light attack bomber, the Lockheed RF-80A Shooting Star tactical reconnaissance aircraft, and the Boeing B-29 Superfortress heavy bomber. Support units were equipped with the Douglas C-54 Skymaster cargo aircraft and the Boeing RB-17 Flying Fortress, a former heavy bomber converted to photo mapping duties. FEAF personnel also trained, supported and flew with the fledgling Republic of Korea Air Force (ROKAF) under the Bout One Project, primarily operating excess World War II-vintage F-51D Mustang fighter aircraft transferred from USAF inventory, re-marked with ROKAF insignia, and operated in interdiction/ground attack and close air support roles. * Elements of the 2d and 3d Air Rescue squadrons, attached to FEAF by the Military Air Transport Service (MATS), were located at various bases where they could best perform emergency rescue services with their SB-17 Flying Fortresses. The 512th and 514th Weather Reconnaissance Squadrons of the 2143d Air Weather Wing were located at Yokota Air Base, Japan, and Andersen Air Force Base, Guam. All USAF units engaged in combat during the Korean War were under the overall command of Far East Air Forces. ** The 31st Photo Reconnaissance Squadron was a Strategic Air Command unit, attached to FEAF for operations. On 29 June 1950, the unit began flying combat missions over the Korean Peninsula in their RB-29 Superfortresses to provide FEAF Bomber Command with target and bomb-damage assessment photography. In response to the threat posed by the introduction of Soviet-built (and often Soviet-manned) MiG-15 jet fighters into the Korean People's Air Force (KPAF), USAF F-80 and F-82 units were later re-equipped with the North American F-86 Sabre jet fighter between December 1951 and Spring 1953. Eventually, these USAF F-86 units would establish a kill ratio of 10:1 versus their KPAF adversaries. During the Korean War (1950–1953), alongside the U.S. Navy and small allied contingents, FEAF's Fifth Air Force bore the brunt of the coalition air combat operations. Cold War With the 1953 Korean Armistice, the deployed SAC and TAC units to Japan and Korea were gradually withdrawn, and returned to the United States. Twentieth Air Force was inactivated on 1 March 1955, leaving FEAF with two Air Forces, the Fifth in Japan and the Thirteenth in the Philippines, although units