The Loon, also called the JB-2 or KUW-1, was an American copy of the German pulsejet-powered V-1 or "Buzz Bomb" of World War II. It was designed to carry a 2,200-pound high explosive warhead to a range of 150 miles and could be launched from the ground, ships, or aircraft. It was not used in combat. However, it provided invaluable experience to U.S. Navy and Army Air Force (and later, Air Force) personnel in the handling of missiles.