The X-15 wasn’t just a plane—it was a groundbreaking experiment that pushed humanity closer to space. With speeds of Mach 6.7 ...

-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 ...

The Space Force operates the Global Positioning System satellite network to provide navigation services to ships, airplanes, ...