English: The AGM-86A was the first version of the US. Air Force’s air-launched cruise missile (ALCM). Designed to carry either a conventional or nuclear warhead, it had a turbofan jet engine, flew at subsonic speeds, and used an inertial navigation system with terrain contour-matching radar. Because the missile flew close to the ground, it was difficult for enemy radars to detect. Most AGM-86As were used in flight tests in 1976. The missile never became operational. Subsequent versions of the ALCM with conventional or nuclear warheads and longer range have been produced and deployed on B-1 and B-52 bombers. Picture taken at the National Air and Space Museum's Steven F. Udvar-Hazy Center in Chantilly, Virginia, USA.