20" x 16".  Full-color poster of the SR-71,a high-altitude reconnaissance plane developed with the backing of the CIA.  It was capable of an altitude of 90,000 ft. and Mach 3.2+ speed, faster than a rifle bullet, but it was tough to land.  Of the 32 Blackbirds built, 11 crashed on landing.  In 1968, a presidential order required that all molds and tools used to build the SR-71 be destroyed so that the plane could never be built again. This also meant that spare parts could not be made, so if there were any major problems, planes in storage would have to be cannibalized. In 1990,  the SR-71 fleet was decommissioned at Beale AFB. Five years later, three of the planes were returned to service, but it cost $140 million a year to keep them flying.  The Air Force felt the money could be better used, so the plane was taken out of service.