From virtual strip search to virtual candid camera, the TSA has you covered. This slightly opaque post from the TSA’s nearly unbearably cheeky Evolution of Sercurity blog makes only one thing clear - you are being watched more than you thought. There are, at least, warning signs. This removes none of the creepiness though. I read the post a couple of times and still can’t tell you how SPO-7 works or what good it does. It either is or isn’t similar to the Millimeter Wave strip search technlogy. Maybe you’ll make more of it.
Similar technology is being used to screen international travelers who may be ill with swine flu.