I read this on Yahoo News, so I don't know how reliable it is, but it seems that the Pentagon have discovered Canadian spy coins--hollow coins fitted with transmitters that can track your movement--on American defense contractors travelling through Canada.

I don't know if Canada is planning to invade the US or free Saddam, but I've got news for them... Saddam is dead! Now come on, think about it! How silly can you get? Using a Canadian coin to store a tracking device? Is this to track a person or to track his purchase?

Hmmm, perhaps this is a ploy of the Canadian Treasury to see how their currency is being used. I wouldn't put it past them to want to study the movement of their coins... those evil Canadians.