So I had never really thought about GPS as one of our crutches here in the US, particularly not as much as oil reliance or the national deficit, but these two articles have interesting points. GPS does a lot more than give you directions these days. It is the backbone of traffic flow in the air and in the harbors. It was just a few years ago that the US Navy announced they were no longer teaching how to use that funny compass looking device for navigation anymore, but were now going by computer. Apparently finances and other transactions are even stamped with the time signature in the GPS signal. I've heard a GPS blocker is not too expensive to buy (article 2 says $30) and that they aren't that hard to make. It can even kill the ability of cell phones to connect to the signal tower. Not to freak you out, but you should take a peak and maybe become far more aware than you previously were, like me.
Article 1
Article 2
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