The X-38 research vehicle drops away from NASA's B-52 mothership during a 1999 test flight.
Credit: NASA | Carla Thomas
In this historical from the U.S. space agency, the X-38 research vehicle drops away from NASA's B-52 mothership immediately after being released from the B-52's wing pylon. More than 30 years earlier, this same B-52 launched the original lifting-body vehicles flight tested by NASA and the Air Force at what is now called the Dryden Flight Research Center and the Air Force Flight Test Center.
NASA B-52 Tail Number 008 is an air launch carrier aircraft "mothership," as well as a research aircraft platform that has been used on a variety of research projects.
Each weekday, SPACE.com looks back at the history of spaceflight through photos (archive).