Project Nike was a U.S. Army project, proposed in May 1945 by Bell Labs, to develop a line-of-sight anti-aircraft missile system. The project delivered the United States' first operational anti-aircraft missile system in 1953, the Nike Ajax. A huge number of the technologies and rocket systems used to develop the Nike Ajax were re-used in a number of roles, many of which gained the "Nike" name (after Nike, the goddess of victory from Greek mythology). The missile's first-stage solid rocket booster became the basis for everything from the Nike Hercules missile to NASA's Nike Smoke rocket, used for upper-atmosphere research.
Project Nike began in 1944 when the War Department demanded a new air defense system to combat the new jet aircraft, as existing gun-based systems proved largely incapable of dealing with the speeds and altitudes at which jet aircraft operated. Two proposals were accepted. Bell Labs offered Project Nike. A much longer-ranged collision-course system was developed by General Electric, named Project Thumper, eventually delivering the BOMARC missile.
Bell's proposal would have to deal with bombers flying at 500 mph (800 km/h) or more at altitudes of up to 60,000 ft (20,000 m). At these speeds, even a supersonic rocket is no longer fast enough to be simply aimed at the target. The missile must "lead" the target to ensure the target is hit before the missile runs out of fuel. This means that the missile and target cannot be tracked by a single radar, increasing the complexity of the system. One part was well developed. By this point, the US had considerable experience with lead-calculating analog computers, starting with the British Kerrison Predictor and a series of increasingly capable U.S. designs.