An Atlas 5 rocket sits under beautiful blue skies on a warm spring day in Florida, awaiting a sunset blastoff carrying the U.S. military's experimental X-37B spaceplane, the prototype for an unmanned reusable space shuttle.

Photo credit: Spaceflight Now

Credit: Spaceflight Now photo by Justin Ray   Credit: Spaceflight Now photo by Stephen Clark   Credit: Spaceflight Now photo by Justin Ray   Credit: Spaceflight Now photo by Justin Ray   Credit: Spaceflight Now photo by Stephen Clark   Credit: Spaceflight Now photo by Justin Ray   Credit: Spaceflight Now photo by Justin Ray   Credit: Spaceflight Now photo by Stephen Clark   Credit: Spaceflight Now photo by Justin Ray   Credit: Spaceflight Now photo by Justin Ray   Credit: Spaceflight Now photo by Stephen Clark   Credit: Spaceflight Now photo by Justin Ray   Credit: Spaceflight Now photo by Justin Ray   Credit: Spaceflight Now photo by Justin Ray   Credit: Spaceflight Now photo by Stephen Clark   Credit: Spaceflight Now photo by Justin Ray