North American X-15A-2 Three X-15s were built, and they made 199 flights between 1959-1968. The program was a joint U.S. Air Force/Navy/NASA project, and four of its 12 pilots were U.S. Air Force officers. One pilot, USAF Maj. Michael J. Adams, died in an X-15 crash in 1967. Another X-15 pilot, Neil Armstrong, later became the first man to walk on the moon. #dronevideo #x15 | National Museum of the U.S. Air Force

X-15 Flight by Capt. Joe H. Engle - footage taken at Edwards AFB(historic footage no audio). #avgeek #airhistory | National Museum of the U.S. Air Force