An anonymous reader writes "U.S. security officials say they will use RFID technology at border posts with Canada and Mexico to track foreigners driving in and out of the United States. A Department of Homeland Security spokesman said wireless chips for vehicles would become mandatory at designated border crossings in Canada and Mexico as of Aug. 4. At the same time, British officials are considering using RFID chips to identify the dead in the wake of a disaster." From the British article: "...following the bomb blasts on the London Underground, the process of identifying some bodies - particularly on the deep-lying Piccadilly Line - became very difficult, with some families upset by the amount of time it took to confirm a relative had died. VeriChip advocates argue it could help in these circumstances. "
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