The USAF SR-71 Blackbird Program
The SR-71 Blackbird has a long and distinguished career during it's operations for the USAF.
In December 1962, the Air Force ordered six “reconnaissance/strike” aircraft for high-speed, high-altitude flights over hostile territory after a nuclear attack—hence its original designator RS. Compared to the A-12, the SR-71 was about six feet longer, weighed 15,000 pounds more fully loaded, had more prominent nose and body chines and a two-seat cockpit, and carried additional optical and radar imagery systems and ELINT sensors in interchangeable noses.