CIA following Twitter, Facebook

In this Nov. 26, 2010, file photo, activists shout anti-government slogans as they march through the low-income neighborhood of Imbaba, in Cairo, Egypt. Egyptian activists organized several small "Day of Anger" rallies across the country to protest police violence during the parliamentary election campaign, with the rallies organized via Facebook and tweets. The team from the CIA's Open Source Center, housed in a unassuming brick building in a Virginia industrial park, pores daily over tweets, Facebook, newspapers, TV news channels, local radio stations, Internet chat rooms _ anything overseas that anyone can access, and contribute to, openly. The center saw the uprising in Egypt coming said the center's director, Doug Naquin. The center already had "predicted that social media in places like Egypt could be a game-changer and a threat to the regime," he said in a recent interview with The Associated Press. (AP Photo/Ben Curtis, File)

November 4, 2011 6:04:48 AM PDT
In an anonymous industrial park in Virginia, in an unassuming brick building, the CIA is following tweets - up to 5 million a day.