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Like a Swarm of Lethal Bugs: The Most Terrifying Drone Video Yet

An Air Force simulation says researchers are at work on killer robots so tiny that a group of them could blend into a cityscape.

Science writer John Horgan's feature on the many ways drones will be used in coming years is interesting throughout, and terrifying in the passage where he describes an effort to build micro-drones that are, as the U.S. Air Force describes them, "Unobtrusive, pervasive, and lethal."