The F-4 Phantom is a supersonic fighter bomber developed by McDonnell Douglas that can travel at twice the speed of sound. Over 5,000 F-4 Phantoms were produced between 1958-1981, making it the most numerous American supersonic military aircraft. Powered by two jet engines, the F-4 is equipped to carry various air-to-air and air-to-ground missiles and bombs using its nine external hardpoints and internal cannon.