An X-37B space plane touches down at Vandenberg Air Force Base in California on Oct. 17, 2014 to end a 22-month secret mission for the U.S. military. It marked the third X-37B space plane flight since ...
After spending more than a year orbiting our planet on a hush-hush mystery mission, the U.S. Air Force's X-37B space plane is due to return to Earth any day now. Air Force officials haven't announced ...
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