The RFID tag in your passport knows who and where you are.

Everyone born after 1964 will be in compliance by 2011. I think we get until 2017. There's a tie in with driver's licenses and "security." Go watch the 9 minute preview of Zeitgeist on youtube for more information. :17:

One of these is bound to be it. :covri:

http://www.youtube.com/results?search_query=zeitgeist+trailer