SuicideBombers
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Modified radar gun identifies suicide bombers up to ten meters away
William Fox of the Naval Postgraduate School in Monterey and John Vesecky, his colleague at UC Santa Cruz, are working on a modified radar gun that can identify suicide bombs worn under the clothing. To do this, they cataloged the most common arrangements of looped wires used to construct "suicide vests," and developed software that can identify the radar cross-section of each. So far, results have been pretty good: according to New Scientist, "telltale factors in the polarisation of the reflected signals" allowed them to correctly identify volunteers dressed as bombers up to ten meters away, roughly eighty-five percent of the time. Of course, even with a success rate this high, such a system would be prone to kicking up false positives. In order to minimize this, the devices would have to combined with other technologies, such as smart surveillance camera systems and infrared imaging.
Flying suicide bomber drones could be almost unstoppable
If you thought the 12-gauge shotgun-wielding AutoCopter was bad news, imagine one of the little menaces in the hands of a terrorist and strapped with several pounds of explosives -- or worse, biological, chemical, or radiological payloads. Several experts are warning that we are nearly defenseless against such attacks, even though terrorists have already shown a propensity for using such tactics in the Middle East and South America, and are known to have purchased so-called "drone" airplanes capable of high-precision navigation even over long distances. One scenario that is particularly disturbing involves a fleet of drones or robotic helicopters launched from an off-shore freighter, sent en masse to attack a large gathering like a sporting event where stampeding from panic would likely cause more deaths than the bombs themselves. The Pentagon is supposedly working on an drone-killing drone of its own, called Peregrine, that would patrol the skies and intercept any hostile aircraft -- but the main problem seems to be finding, not destroying these things, and you'd need a whole lot of Peregrines to cover every potential target in the US.[Via Phys Org]
