millimeter waves? the skin-burning police crowd control device is  95GHz, ie. 3.2mm wavelength.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Active_Denial_System#Effects" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Active_Denial_System#Effects</a>