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The Boeing-built X-37B, the US military's unmanned robotic space shuttle, is shown in this handout photo in a hangar at Vandenberg Air Force Base, California June 16, 2012, after completing a secretive 15-month test flight. The miniature space plane, also known as Orbital Test Vehicle-2, or OTV-2, was only the second US vehicle to make an autonomous runway landing from space. [Photo/Agencies] |
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The Boeing-built X-37B, the US military's unmanned robotic space shuttle, is shown in this handout photo at Vandenberg Air Force Base, California June 16, 2012, after completing a secretive 15-month test flight. [Photo/Agencies] |
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