McDonnell-Douglas F-4 Phantom II. Introduced in 1960 with the US Navy and later the Marines and USAF. Top speed is Mach 2.2 and it can carry 18,000lbs (8,400kg) of weapons on 9 external hardpoints, including various missles and bombs. It was the last US fighter to attain Ace status in the 20th century. With a total of 5,195 built from 1958 - 1981, it is the most numerous US supersonic military aircraft and is still in service.