A Supersecret Spacecraft Comes Back to Earth After Two Years

The U.S. Air Force has a top-secret space shuttle drone, and only the Internet seems to know what its mission is.

The X-37B Orbital Test Vehicle on the runway during post-landing operations on Dec. 3, 2010, at Vandenberg Air Force Base in California.

Photographer: Michael Stonecypher/U.S. Air Force

The U.S. Air Force has kept an unmanned space shuttle in orbit for the past two years, and it seems no one without security clearance knows what it’s been doing up there.

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