The latest request from the Pentagon jars the senses. They are looking for contractors to provide a Multi-Robot Pursuit System" that will let packs of robots "search for and detect a non-cooperative human". Given that iRobot last year struck a deal with Taser International to mount stun weapons on its military robots, how long before we see packs of droids hunting down pesky demonstrators with paralysing weapons? Or could the packs even be lethally armed? Steve Wright of Leeds Metropolitan University is an expert on police and military technologies. "The giveaway here is the phrase 'a non-cooperative human subject'," he told me: "What we have here are the beginnings of something designed to enable robots to hunt down humans like a pack of dogs. Once the software is perfected we can reasonably anticipate that they will become autonomous and become armed. We can also expect such systems to be equipped with human detection and tracking devices including sensors which detect human breath and the radio waves associated with a human heart beat. These are technologies already developed." Noel Sharkey, an AI and robotics engineer at the University of Sheffield, says "This is a clear step towards one of the main goals of the US Army's Future Combat Systems project, which aims to make a single soldier the nexus for a large scale robot attack. Independently, ground and aerial robots have been tested together and once the bits are joined, there will be a robot force under command of a single soldier with potentially dire consequences for innocents around the corner."