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The Lockheed '''SR-71 Blackbird''' was a [[Mach]] 3+ reconnaissance aircraft designed by Clarence L "Kelly" Johnson at Lockheed's "[[Skunk Works]]" plant in the late 1950s, the Blackbird served until 1989. In 1994, the program was reactivated under [[NASA]], and the aircraft continued to fly until 1999.
The Lockheed '''SR-71 Blackbird''' was a [[Mach]] 3+ reconnaissance aircraft designed by Clarence L "Kelly" Johnson at Lockheed's "[[Skunk Works]]" plant in the late 1950s, the Blackbird served until 1989. In 1994, the program was reactivated under [[NASA]], and the aircraft continued to fly until 1999.
Due to the friction caused by the SR-71's titanium airframe with the outside atmosphere, the SR-71 could expand as much as one foot during high-speed flight.
Many consider the SR-71 Blackbird to be the finest military aircraft ever produced, and Defense Secretary [[Robert S. McNamara]] inexplicably ordered destruction of its plans, which prevented further manufacturer of it.<ref>http://www.azstarnet.com/opinion/302870</ref>
Many consider the SR-71 Blackbird to be the finest military aircraft ever produced, and Defense Secretary [[Robert S. McNamara]] inexplicably ordered destruction of its plans, which prevented further manufacturer of it.<ref>http://www.azstarnet.com/opinion/302870</ref>