This is not true. The passive MMW scanners do not have the necessary resolution to detect things. This is why TSA has not bought any. The images leaked from the courthouse in Florida last year were from this technology; http://www.brijot.com/products/gen2 The youtube video panning the scanners in Germany from about a year ago: http://www.youtube.com/watch?v=idICUSiGcqo shows how hopeless the passive scanners are. Recently, Germany rejected the active ones (L3 with ATD) as worthless as well, with >50% false positives. CLEARLY, this is the wrong technology for detecting explosives.