The U.S. Air Force X-37B on Secret Mission

A look at the U.S. Air Force X-37B spaceplane; the experimental unmanned spaceship, whose first mission was in 2010, launched from Cape Canaveral on Tuesday. MCT 2012

Yingling

A look at the U.S. Air Force X-37B spaceplane; the experimental unmanned spaceship, whose first mission was in 2010, launched from Cape Canaveral on Tuesday. MCT 2012

A look at the U.S. Air Force X-37B spaceplane; the experimental unmanned spaceship, whose first mission was in 2010, launched from Cape Canaveral on Tuesday. MCT 2012