Updated 2:00 PM EDT, Wed, May 20, 2020

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Terra firma at last

Clandestine X-37B Spaceplane Finally Returns to Earth after Record 718 Days in Orbit

The X-37B is a sophisticated spy spaceplane that's been equipped with high-resolution cameras on all its four missions.

EmDrive tester

U.S. Air Force’s Top Secret X-37B Spaceplane Breaks Space Endurance Record

The X-37B is testing a prototype "Hall Effect Thruster" (HET).

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