Project Hostile Intent (Dept. Of Homeland Security)

The idea is that entrants to the USA would, basically, be mind-probed by amazing new tech to be developed by the Human Factors Division of the DHS Science & Technology directorate. The S&T boys swear blind that the technology will be "non-invasive" - oh, thank god - and will "identify deception and hostile intent in real time, on the spot... without ever impeding the flow of travellers".
...
New Scientist reports that this is already done by specially-trained human screeners, but that's too manpower-intensive and time consuming for widespread use. Apart from expression scanning, the computers might check for suspicious eyeball movements - bad guys are well known to shiftily look left and right when worried.
http://www.theregister.co.uk/2007/08/09/no_not_the_mind_probe_again/

Experimental Testing of Project Hostile Intent Technology (PDF)
http://www.dhs.gov/xlibrary/assets/privacy/privacy_pia_st_phi.pdf