The A-5 was designed to meet a US Navy requirement for a
high-performance all-weather attack aircraft. Originally designated
the A3J, the prototype first flew on 31 August 1958.
Redesignated the A-5 in 1962, the Vigilante was capable of delivering a
nuclear bomb. Changes in Navy policy cut short the A-5's career as a
Mach 2 strike aircraft; however, as the RA-5 the Vigilante was a
successful reconnaissance aircraft.