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The X-37B sits on the Vandenberg Air Force base runway during post-landing operations Dec. 3. The X-37B, named Orbital Test Vehicle 1 (OTV-1), conducted on-orbit experiments for more than 220 days during its maiden voyage. It fired its orbital maneuver engine in low-earth orbit to perform an autonomous reentry before landing. (U.S. Air Force photo/ Michael Stonecypher)
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