-Air-launched from a B-52, the X-15 reached a record-breaking speed of Mach 6.7 and flew high enough to earn astronaut wings for eight of its pilots. -While never intended as a weapon, the X-15 was a ...

Discover the story of the North American X-15's first powered flight on September 17, 1959, when Scott Crossfield piloted the ...

On Aug. 22, 1963, U.S. Air Force Captain Joe Walker flew an X-15 space plane higher than any pilot had ever flown before. Walker reached an altitude of over 67 miles (108 kilometers). That's about 5 ...

American space agency NASA is busy checking the safety systems and the procedures for the first flight of the X-59 supersonic aicraft.

The latest mission of the U.S. Space Force's mysterious X-37B space plane is underway. The robotic X-37B lifted off atop a SpaceX Falcon 9 rocket from NASA's Kennedy Space Center (KSC) in Florida ...