Unblinking eyes in the sky — Drone aircraft are no longer restricted to military use. They are being built & used by hobbyists, activists & estate agents, among others. What are the implications for safety privacy?

http://www.economist.com/node/21548485

/ UAVs unmanned aerial vehicles Federal Aviation Administration FAA sense-and-avoid systems pilotless planes helicopter Qube AeroVironment Monrovia California /