ESA see-through security in worldwide service
(PHYSorg.com Physics)

The odds are high that you have already interacted with one of ESA`s most-far-reaching inventions without realising it. Terahertz security cameras-currently employed in 18 countries including many major airports and the LA Metro-scan passengers for concealed weapons or contraband in their clothing from up to 10 meters away, operating on an entirely passive, non-invasive basis.