Screen Shot 2015-12-18 at 18.32.04 Published on December 18, 2015 in 15 April 1952Full resolution (1005 × 964) ← Previous Next → Captain William Magruder (standing) Boeing Chief Test Pilot Alvin M. Johnston (center) and Lieutenant Colonel Guy M. Townsend with the Boeing YB-52 Stratofortress 49-231. (Boeing)