The U.S. Air Force's robotic X-37B space plane came back to Earth on June 16 after 15 months in orbit on a mystery mission, and its much-anticipated landing ...
Secret Missions of the X-37B
Launch of X-37B Mini Space Shuttle on OTV-3 Mission
X-37 ALTV Test Flight (2010)
Secret X-37B Spaceplane's Mystery Mission!
X-37B: Secret space plane
X-37B SHUTTLE DISAPPEARS!
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