Giving Transportation Security Administration agents a peek under your clothes may soon be a practice that goes well beyond airport checkpoints. Newly uncovered documents show that as early as 2006, the Department of Homeland Security has been planning pilot programs to deploy mobile scanning units that can be set up at public events and in train stations, along with mobile x-ray vans capable of scanning pedestrians on city streets. The non-profit Electronic Privacy Information Center (EPIC) [has] published documents it obtained from the Department of Homeland Security showing that from 2006 to 2008 the agency planned a study of of new anti-terrorism technologies. The projects range from what the DHS describes as "a walk through x-ray screening system that could be deployed at entrances to special events" ... to "covert inspection of moving subjects" employing the same backscatter imaging technology currently used in American airports. The 173-page collection of contracts and reports, acquired through a Freedom of Information Act request, includes contracts with Siemens Corporations, Northeastern University, and Rapiscan Systems. One project allocated to Northeastern University and Siemens would mount backscatter x-ray scanners and video cameras on roving vans, along with other cameras on buildings and utility poles, to monitor groups of pedestrians, assess what they carried, and even track their eye movements. It's not clear to what degree the technologies outlined in the DHS documents have been implemented.