Most of the recent talk about Big Brother-style aerial surveillance of civilians tends to focus on drones, but while we weren’t paying attention, a company called Persistent Surveillance Systems has developed a camera system for light aircraft with truly scary snooping capabilities. The system has 12 underbelly 192-megapixel cameras fitted to a Cessna light aircraft, and each one takes a new picture every second over an area that can be as large as five miles by five miles.