CIA following Twitter, Facebook

In an anonymous industrial park in Virginia, in an unassuming brick building, the CIA is following tweets — up to 5 million a day. At the agency's Open Source Center, a team known affectionately as the "vengeful librarians" also pores over Facebook, newspapers, TV news channels, local radio stations, Internet chat rooms — anything overseas that anyone can access and contribute to openly.http://news.yahoo.com/ap-exclusive-cia-following-twitter-facebook-081055316.html