Say Hello to the Goodbye Weapon by David Hambling in Wired News.
The Active Denial System is still in limbo here’s the vital info:
Documents acquired for Wired News using the Freedom of Information Act claim that most of the radiation (83 percent) is instantly absorbed by the top layer of the skin, heating it rapidly.
The beam produces what experimenters call the “Goodbye effect,” or “prompt and highly motivated escape behavior.” In human tests, most subjects reached their pain threshold within 3 seconds, and none of the subjects could endure more than 5 seconds.
Hambling posts quite frequently at Defense Tech and has a companion piece up over there called Drunks, Butts Test Pain Ray; Paris Hilton Next?
Here is previous MO coverage of the ADS: