See the link below. Indicates big brother can track your cash by using an rfid chip embedded in the new bills read the article in the link below. A2J Jess http://www.prisonplanet.com/022904rfidtagsexplode.html
14 years, apparently, and they still are not doing it. There was some BS a few years ago that said they were in fact doing this. The supposed way to defeat it was to put your money in the microwave oven and turn it on.