The F-107 was North American's entry into the 1950s USAF tactical fighter-bomber design competition and was based on the F-100 but with the over-fuselage engine air-intakes as the main innovation. The competition was eventually won by the F-105 Thunderchief and in the end only three test F-107s were produced. This was the first example built and is now on display at the superb Pima Air & Space Museum.