The Active Denial System (ADS) is a non-lethal, directed-energy weapon developed by the U.S. military. It is a strong millimeter-wave transmitter primarily used for crowd control (the "goodbye effect"). Some ADS systems such as HPEM ADS are also used to disable vehicles. Informally, the weapon is also called pain ray. Raytheon is currently marketing a reduced-range version of this technology. The ADS was being considered for deployment in the Iraq War
