I don't understand the big to-do about drones flying over American cities. UAVs that can hover, track and perch will be America's first line of defense against radiological and chemical weapons. Even aside from terrorism concerns, police use helicopters to follow criminals all the time, and at exorbitant costs. These UAVs will be far cheaper than manned helicopters, more capable, and safer for pilots and civilians on the ground. They'll be quieter, use less fuel, and won't unionize. It's a winning combination for everyone.
For more information on some commercial fixed-wing UAVs that are also seeing plenty of military use, check out the AeroVironment's product line.