Advanced Tactical Fighter selection (1986-1991)
In April 1991, the Air Force chose the Lockheed-Boeing-General Dynamics YF-22 over Northrop and McDonnell Douglas' YF-23 for the Advanced Tactical Fighter program. The YF-23 was widely seen as stealthier and faster, but the YF-22's maneuverability and cockpit visibility won over evaluators. The YF-22 became the F-22 Raptor.
Lockheed built the F-22 Raptor, which entered service in 2005. Northrop exited crewed fighter design for decades.
Northrop has not designed a U.S. crewed fighter since. The company now focuses on bombers (B-2, B-21), drones, and missiles.
Northrop's F/A-XX loss mirrors its YF-23 defeat. The company is again shut out of crewed fighter production, now for at least another generation, while Boeing and Lockheed split the market.
