The Lockheed P-80 Shooting Star was the first jet fighter used operationally by the United States Army Air Forces (USAAF).[2] Designed and built by Lockheed in 1943 and delivered just 143 days from the start of the design process, production models were flying, and two pre-production models did see very limited service in Italy just before the end of World War II. Designed with straight wings, the type saw extensive combat in Korea with the United States Air Force (USAF) as the F-80. America's first successful turbojet-powered combat aircraft, it helped usher in the "jet age" in the USAF, but was outclassed with the appearance of the swept-wing transonic MiG-15 and was quickly replaced in the air superiority role by the transonic F-86 Sabre. The F-94 Starfire, an all-weather interceptor on the same airframe, also saw Korean War service. The closely related T-33 Shooting Star trainer would remain in service with the U.S. Air Force and Navy well into the 1980s, with the last NT-33 variant not retired until April 1997. Many T-33s still serve in a military role in foreign air arms or are in private hands, although the F-80 itself has long been retired from active service..