Apr 7, 2014 at 9:19 PM
One of the uses for a high endurance UAV would be to "stare" at the battlefield for a long period of time to produce a record of events that could then be played backwards to track where improvised explosive devices (IEDs) came from. Air Force Chief of Staff John P. Jumper started a program to create these persistent UAVs, but this was stopped once he was replaced.
http://www.rctopshop.com/esky-rc-helicopters
http://www.rctopshop.com/esky-rc-helicopters