Collecting travel data more extensive than suspected...

If you wonder about how far our government has gone to track our travel data, then you'll want to read, Collecting of Details on Travelers Documented. I urge you to read the article in full, then ask yourself if you feel the government really needs to spend that much time, energy and money on us for information like this:

...new details about the information being retained suggest that the government is monitoring the personal habits of travelers more closely than it has previously acknowledged. The details were learned when a group of activists requested copies of official records on their own travel. Those records included a description of a book on marijuana that one of them carried and small flashlights bearing the symbol of a marijuana leaf.