I actually can speak to that a little bit. NORAD and NORTHCOM...the U.S. military has had a very difficult time with drones over the United States. They asked for permission, after the New Orleans flood disaster, to put some unmanned aircraft up, and that permission was denied. The U.S. military has some very specific areas they can fly in, and that's about it, within the United States.
On December 2nd, 2014. See this statement in context.