The X-37B Orbital Test Vehicle sits on the runway at Vandenberg Air Force Base, Calif., Dec. 3, 2010, during post-landing operations. Personnel in self-contained atmospheric protective ensemble suits are conducting initial checks on the vehicle and ensuring the area is safe. The X-37B launched April 22 from Cape Canaveral, Fla., allowing teams to conduct on-orbit experiments for more than 220 days during this first mission. (U.S. Air Force photo/Michael Stonecypher)