We've all heard about drones used by the military against hostile forces, by law enforcement and to patrol America's borders. The private uses of Unmanned Aerial Vehicles are currently limited to 400 feet off the ground, within sight of the operator. But a mandate from Congress, signed by the President, is about to make UAV's -- drones -- a ubiquitous presence in civilian life. What are the possible consequences for the "friendly skies?" We hear about unlimited usefulness, as well as safety and privacy.