HSV Technologies of San Diego, California says it has developed a weapon that shoots two ultraviolet laser beams that create channels of ionised air up to 2 kilometers long. These glowing, green beams of electrically conductive plasma carry high-voltage, 10 milliamps current, one positively charged and one negatively charged. Muscles in the body of someone hit by the beams then contract and the target is painlessly immobilized. The company says the weapon is far more effective than the taser and can also be used to shut down motors.

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