A X47-B Navy drone touches down as it lands aboard the nuclear aircraft carrier USS George H. W. Bush off the Coast of Virginia Wednesday, July 10, 2013. It is the first landing by a drone on a Navy carrier. (AP Photo/Steve Helber)

Photo by: Steve Helber

A X47-B Navy drone touches down as it lands aboard the nuclear aircraft carrier USS George H. W. Bush off the Coast of Virginia Wednesday, July 10, 2013. It is the first landing by a drone on a Navy carrier. (AP Photo/Steve Helber)