You're hiking with your dog across a pasture in a decidedly rural part of Oklahoma. Think you couldn't possibly be within sight of a camera? Think again. Your otherwise uneventful walk could be filmed from the skies. And no, this isn't a military exercise gone awry.
A 2013 congressional report by the Federal Aviation Administration predicts up to 30,000 unmanned drones, which are unmanned aerial vehicles, will fly above the U.S. within two decades -- or sooner. Agencies ranging from public schools to police departments have received federal approval for drone use [source: Irby].
The FBI has been using surveillance drones during investigations for some time, but the 2013 push to introduce aerial drones for commercial use -- everything from monitoring traffic to dusting crops with chemicals -- is uncharted territory [source: Shubber].