X-15 Move to Fourth Building
Retired NASA astronaut and the only surviving X-15 pilot, Maj. Gen. (Ret.) Joe Engle poses in front of the museum’s X-15A-2. The X-15 became the first aircraft to be moved into the fourth building when it was moved from the restoration hangar on Oct. 2, 2015. (U.S. Air Force photo by Ken LaRock)