Over at the Intercept, Jeremy Scahill and Ryan Devereaux break down the federal government's terrorist watchlist for us:
Of the 680,000 people caught up in the government’s Terrorist Screening Database—a watchlist of “known or suspected terrorists” that is shared with local law enforcement agencies, private contractors, and foreign governments—more than 40 percent are described by the government as having “no recognized terrorist group affiliation.”
....[Classified] documents, obtained from a source in the intelligence community, also reveal that the Obama Administration has presided over an unprecedented expansion of the terrorist screening system. Since taking office, Obama has boosted the number of people on the no fly list more than ten-fold, to an all-time high of 47,000—surpassing the number of people barred from flying under George W. Bush.
....Most people placed on the government’s watchlist begin in a larger, classified system known as the Terrorist Identities Datamart Environment (TIDE)....In the summer of 2013, officials celebrated what one classified document prepared by the National Counterterrorism Center refers to as “a milestone”—boosting the number of people in the TIDE database to a total of one million, up from half a million four years earlier.
There's much more at the link. Click to read the whole thing.