What if we told you the Pentagon has a ray gun? And what if we told you it can stop a person in his tracks without killing or even injuring him? Well, it's true. You can't see it, you can't hear it, but ... you can feel it. Pentagon officials call it a major breakthrough. It's a gun that doesn't look anything like a gun: it's [a] flat dish antenna which shoots out a 100,000-watt beam at the speed of light, hitting any thing in its path with an intense blast of heat. An operator uses a joystick to zero in on a target. Visible only with an infrared camera, the gun, when fired emits a flash of white hot energy -- an electromagnetic beam made up of very high frequency radio waves. Officially called the Active Denial System," it does penetrate the body, but just barely. What makes this a weapon like no other is it inflicts enough pain to make you instantly stop whatever it is you're doing. But the second you get out of the beam the pain vanishes. And as long as it's been used properly, there's no harm to your body. So far, the ray gun has been tested only against make-believe adversaries, protestors whose rage is about as real as the placards they're carrying. The ray gun has been tested on humans more than 11,000 times over ten years. The early tests, recorded with an infrared camera, were against people in their underwear so scientists could measure skin temperature. Their backs were turned so their eyes would not be exposed. Out of 11,000 tests there have been six cases of rashes and blisters, and two of more serious second degree burns. It's now cleared for full power on any part of the body.