The sky over Washington, DC, is a busy place. Helicopters--police, news, medical, and not infrequently carrying the President himself--cross the greater metropolitan area at all hours. Airliners travel to and from Reagan National Airport, just across the Potomac from the district. Since 2003, the District of Columbia has had a special exclusion zone for aircraft, designed to keep airborne security threats away. In September, the FAA made it clear that this applied to drones, and now, just over a week into a national drone registration drive, the FAA is shutting down drone clubs as far as 30 miles from the Capitol.