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

7.6K views · 142 reactions | The X-15 was a joint hypersonic research...