Fantastic Lad writes: This machine has the ability to inflict limitless, unbearable pain. When turned on, Raytheon's 'Silent Guardian' emits an invisible, focused beam of radiation — similar to the microwaves in a domestic cooker — that are tuned to a precise frequency to stimulate human nerve endings. It can throw a wave of agony nearly half a mile. Because the beam penetrates skin only to a depth of 1/64th of an inch, it cannot, says Raytheon, cause visible, permanent injury. The demo model looks like a small speaker. (Image) With practical application is just around the corner, I wonder if anybody at that trade show was selling Faraday body suits. . ?