Replica of the B-1 Lancer. History: The B-1 Lancer is a swing-wing bomber intended for high-speed, low-altitude penetration missions. Its first flight was in December 1974, but by June 1977 the program was canceled. Four Rockwell International B-1As were built and used for flight testing with the final flight made in April 1981. In October, President Ronald Reagan revived the program as the B-1B. It first flew Oct. 18, 1984, could operate at 60,000 feet and had a range of more than 7,000 miles. The U.S. Air Force ordered 100 B-1Bs in 1982, and the first B-1B aircraft was delivered to the Air Force at Edwards Air Force Base, Calif., in October 1984, just 33 months after contract go-ahead. The last Rockwell B-1B rolled out of final assembly at Palmdale, Calif., on Jan. 20, 1988.