jdray writes "Wired has a story on the certification of the Active Denial System for use in Iraq. The ADS is a millimeter-wave weapon that uses a reportedly non-lethal energy beam to inflict short-term pain on its targets, encouraging them to leave an area. Experimenters call this the 'Goodbye effect.' I can see using this in a wartime situation, but how long before we see these things mounted to the top of S.W.A.T. vans for domestic crowd control? And, is that a bad idea?"
From the article: The ADS shoots a beam of millimeters waves, which are longer in wavelength than x-rays but shorter than microwaves — 94 GHz (= 3 mm wavelength) compared to 2.45 GHz (= 12 cm wavelength) in a standard microwave oven... while subjects may feel like they have sustained serious burns, the documents claim effects are not long-lasting. At most, 'some volunteers who tolerate the heat may experience prolonged redness or even small blisters'... There has been no independent checking of the military's claims."
Wired use Freedom of Information Act requests to obtain documents on the military's testing program.