Flt 1-A-18. Pilot-White 8/11/60 AFFTC History Office Published on June 7, 2013 in 8 June 1959, 16:38:40 GMTFull resolution (1200 × 778) ← Previous Next → X-15A 56-6670 under the wing of NB-52A 52-003 at high altitude. Scott Crossfield is in the cockpit of the rocketplane. Air Force Flight Test Center History Office, U.S. Air Force)