This flight, the first of a reused spacecraft made the pilot of the mission qualified under the rules of the U.S. Air Force and the Fédération Aéronautique Internationale a what?
X-15 Flight 91: X-15 Flight 91 was a 1963 American manned mission, and the second and final flight in the program to achieve sub-orbital spaceflight—a flight over 100 km in altitude—which was previously achieved during Flight 90 a month earlier. X-15 Flight 91:  It was the first flight of a reused spacecraft, as plane number three flew the previous sub-orbital flight on July 19. X-15 Flight 91:  This mission was piloted by Joseph A. Walker on August 22, 1963, with the air-launch occurring from a modified Boeing B-52 Stratofortress support plane over Smith Ranch Dry Lake, Nevada, United States. Joseph A. Walker:  His two X-15 experimental rocket aircraft flights in 1963 that exceeded the Kármán line – the altitude of 100 km , generally considered to mark the threshold of outer space – qualified him as an astronaut under the rules of the U.S. Air Force and the Fédération Aéronautique Internationale (FAI).
astronaut