It also discovered that members of a Pakistani terrorist group were working in Philadelphia as taxi drivers.  And, when the United States government lost track of terror suspects during the Hurricane Katrina aftermath, the system was able to track down and find them across the entire southern half of the United States. Many, including the Electronic Frontier Foundation, believe that this kind of data-mining is the first step toward an Orwellian control over the population.  The EFF cites a National Research Council paper that concluded "data mining is a dangerous and ineffective way to identify potential terrorists, which will inevitably generate false positives that subject innocent citizens to invasive scrutiny by their government."