ORBITAL ANTICIPATION The X-37B Orbital Test Vehicle waits in the encapsulation cell at the Astrotech facility in Titusville, Fla., April 13, 2010. Air Force officials are scheduled to launch the spacecraft, April 21, 2010, from Cape Canaveral Air Station, Fla. The X-37B is the nation's newest and most advanced unmanned re-entry spacecraft. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 377830-M-XWN66-987.jpg Photo Gallery