The U.S. military's second experimental X-37B spaceplane, the prototype for an unmanned reusable shuttle, is launched atop an Atlas 5 rocket at 5:46 p.m. EST from Cape Canaveral's Complex 41.

Photo by United Launch Alliance

Photo credit: Scott Andrews/United Launch Alliance   Photo credit: Scott Andrews/United Launch Alliance   Photo credit: Pat Corkery/United Launch Alliance   Photo credit: Scott Andrews/United Launch Alliance   Photo credit: Pat Corkery/United Launch Alliance   Photo credit: Scott Andrews/United Launch Alliance   Photo credit: Pat Corkery/United Launch Alliance   Photo credit: Pat Corkery/United Launch Alliance   Photo credit: Pat Corkery/United Launch Alliance   Photo credit: Pat Corkery/United Launch Alliance   Photo credit: Pat Corkery/United Launch Alliance   Photo credit: Pat Corkery/United Launch Alliance