The Martin Marietta X-24A was an experimental US aircraft developed from a joint USAF-NASA program named PILOT (19631975). It was designed and built to test lifting body concepts experimenting with the concept of unpowered reentry and landing later used by the Space Shuttle.
February 4th 1969: The last flight of the Valkyrie as the North American Aviation XB-70A-1-NA departed on its very last flight from Edwards Air Force Base to Wright-Patterson Air Force Base Ohio. NASA Test Lieutenant Colonel Pilot Fitzhugh L. Fulton Jr. and Lieutenant Colonel Emil Sturmthal taxied the Valkyrie up to the USAF museum where her engines wound down for for the final time and her log books were turned over to the museum curator. by full_afterburner