The Bad News Network: Twitter, Facebook and Liveblogs

Yesterday was not a good day for the District of Columbia and its neighbors. And, like on many other bad-news days, the Internet was there to tell the story of Metro's two-train collision in real time.

Somewhat to my surprise, nobody seems to have been Twittering from either train. But that status-update site quickly filled with updates about the event from people watching it online and on TV -- some of the first photos to emerge on the Web were screen captures of TV news reports...