The X-20 Dyna-Soar, the Air Force Space Plane Boeing Had Ready to Fly in Nineteen Sixty-Three, and the Phone Call from McNamara That Killed It Before the First Pilot Ever Sat in the Real Cockpit
The Air Force's X-20 Dyna-Soar was a pilot-flown reusable orbital spacecraft canceled in 1963 - and its engineering legacy directly shaped the Space Shuttle, X-37B, and Dream Chaser.
Vector