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Secretive US Space Force X-37B space plane 'breaks new ground' with return to Earth after 434 days in orbit (photos)
"The successful execution of the aerobraking maneuver underscores the U.S. Space Force’s commitment to pushing the bounds of ...
From America to Europe in four hours: NASA's supersonic plane set to take flight
Following a few more ground tests, it will fly over numerous cities around the country. NASA will ask people on the ground if ...
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Secretive X-37B space plane shares first images from orbit; see photos
In 2006, the Air Force announced the development of its own variant of the space plane, known as the X-37B, designed to operate with an orbital speed of nearly 17,500 mph for up to 270 days.