Fifty years ago today — June 8, 1959 — Scott Crossfield flew the X-15 on its first glide flight above NASA’s Dryden Flight Research Facility at Edwards Air Force Base, California. (NASA Photo E-4942, from the X-15 Photo Collection.) From Crossfield’s bio: Crossfield left the [National Advisory Committee on Aeronautics] … Continue reading First X-15 Glide Flight, a Half Century Ago