The VISTA Variables in the Via Lactea (VVV) survey is an ESO public survey dedicated to scanning the southern plane and bulge of the Milky Way through five near-infrared filters.
Still, security experts believe there's always a chance that a potential terrorist could slip onto a plane, regardless of whether he's subject to scanning at a high-tech kiosk or a hand search of bags and shoes.
Meanwhile, what similar liquid-scanning technology has the TSA adopted in the six years since a would-be terrorist tried to blow up a plane with liquid explosives?