X-37B Orbital Test Vehicle lands at Vandenberg AFB
VANDENBERG AIR FORCE BASE, Calif. – Personnel in self-contained atmospheric protective ensemble suits conduct initial checks on the X-37B Orbital Test Vehicle 1 (OTV-1), the U.S. Air Force's first unmanned re-entry spacecraft, after its landing here on Friday, Dec. 3, 2010. The X-37B OTV-1 conducted on-orbit experiments for more than 220 days during its maiden voyage. (U.S. Air Force photo/ Michael Stonecypher)