The Pentagon is a very large building that houses a lot of the authorities for the U.S. Military. It's big. This photo doesn't do it justice, but they're kinda rightly concerned about people flying drones around there.

The U.S. Army, continuing a Pentagon trend of scouring the front lines of technological innovation for tools that can help warfighters, has launched a second competition among small businesses that don’t usually fall into the world of defense acquisition. […]