North American Aviation X-15 56-6670 with Boeing NB-52A Stratofortess 52-003, first USAF flight, Robert M. White 13 April 1960 Published on November 12, 2012 in 9 November 1961Full resolution (1141 × 786) ← Previous Next → Boeing NB-52A Stratofortress 52-003 carries a North American Aviation X-15 piloted by Major Bob White. (NASA)