The Active Denial System, or ADS, is mounted on a truck and when it is aimed at an individual it gives the unpleasant sensation of heat or burning on the skin.

Two versions of US Marine Corps trucks are seen carrying the Active Denial System, March 9th, 2012, at the US Marine Corps Base Quantico, Virginia. It is a US DoD non-lethal weapon that uses directed energy and projects a beam of man-sized millimeter waves up to 1000-meters that when fired at a human, delivers a heat sensation to the skin and generally makes humans stop what they are doing and run. AFP Photo/Paul J. Richards (Photo credit should read PAUL J. RICHARDS/AFP via Getty Images)