"Researchers secretly tracked the locations of 100,000 people outside the United States through their cell phone use and concluded that most people rarely stray more than a few miles from home....
Nearly three-quarters of those studied mainly stayed within a 20-mile-wide circle for half a year."
This article " Study secretly tracks cell phone users outside US" written by Seth Borenstein, an AP Science Writer Wed Jun 4, 2:35 PM ET, was on Yahoo! News.
Here's the link to the article if you want to read more:
http://news.yahoo.com/s/ap/20080604/ap_on_sc/sci_cell_phone_tracking
*** Also, could they have been tracked if their cell phones were turned off? ***
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