Active Denial System

“And they were not given authority to kill them, but to torment them for five months. Their torment was like the torment of a scorpion when it strikes a man. In those days men will seek death and will not find it; they will desire to die, and death will flee from them” (Revelation 9:4-6).

"The ADS works by directing electromagnetic radiation at a frequency of 95 GHz toward the subjects. The waves excite water molecules in the epidermis (skin) to around 55 C (130 degrees Fahrenheit), causing an intensely painful burning sensation. While not actually burning the skin, the burning sensation is similar to that of a light bulb being pressed against the skin. The focused beam can be directed at targets at a range of just under half a kilometer, or 500 yards. The device can penetrate thick clothing, although not walls. There is no indication on the feasibility of electromagnetically shielding a person from its effects with a wire mesh, in a similar manner that a microwave oven prevents radiation escaping.

Click on the link below for the full article:

http://en.wikipedia.org/wiki/Active_Denial_System