US Spies Buy Stake in Firm That Monitors Blogs, Tweets

America's spy agencies want to read your blog posts, keep track of your Twitter updates — even check out your book reviews on Amazon. In-Q-Tel, the investment arm of the CIA and the wider intelligence community, is putting cash into Visible Technologies, a software firm that specializes in monitoring social media. It's part of a larger movement within the spy services to get better at using "open source intelligence" — information that's publicly available, but often hidden in the flood of TV shows, newspaper articles, blog posts, online videos and radio reports generated every day.