The USAF operated the SR-71, the world's fastest and highest flying production aircraft, for 24 years. Of the 31 built, 20 survived to the end of the programme, with 14 released for display in aviation museums. Three were put in storage at Lockheed's Air Force Plant 42 Site 2 at Palmdale, California. Two SR-71As and one SR-71B trainer (NASA 831 or S/N 17956), plus the SR-71 cockpit simulator, were loaned to NASA's Dryden Flight Research Center at Edwards AFB, California, for research projects.

Source: Flight International