5 Experimental US Fighter Jets That Never Made it to Production

The US Air Force and Navy have developed scores of experimental fighter jets that never went into production. Sometimes, the aircraft were just intended as a proof of concept. Other times, they lost to a competitor’s design. Still, other times, requirements had changed by the time they were developed (as in the famous case of the North American XB-70 supersonic bomber). Here are five US fighter jets that flew but never entered serial production.