Business Insider -
14 Jun 2018 15:52

NASA The SR-71 Blackbird spy plane is the fastest and highest-flying production aircraft to ever hit the skies. Despite the US Air Force officially retiring the Blackbird in 1990 (although NASA would use two of them for research in that decade),it remains to this day one of the most popular and captivating aircraft. The SR-71 was developed in the early 1960's in response to two U-2 spy planes getting shot down — one over the Soviet Union and one over Cuba. Thousands of missiles would be fired ...
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