![](http://www.alamy.com/thumbs/6/BB28F269-DCA1-403B-8A12-5CCB791A2705/FFH1FG.jpg)
NASA researches received three SR-71s on loan from the Air Force after the program was canceled for high-speed and high-altitude aeronautical research.
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Keywords: aeronautical, air, canceled, drydenimagegallery, force, high-altitude, high-speed, loan, nasa, program, received, research., researches, sr-71s