The agency has invested in robo-planes before. But these latest efforts seem to be concentrated on smaller, lower-flying drones that can closely track the action on the ground.
The "Sentinel Hawk" is a modified Silver Fox drone, equipped with infrared sensors and "built to keep tabs on a specific road or path," Defense News explains. A single operator will be able to command teams of the eight-foot long aircraft, as they patrol the roadways for bombs.
The "Yellow Jacket" robo-copter gives warzone convoys an unmanned eye-in-the-sky. For up to eight hours, the drone will follow around -- and keep watch on -- a vehicle, beaming what it sees down to the ground.
http://blog.wired.com/defense/2009/01/anti-ied-drones.html
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