Yesterday afternoon, the Centers for Disease Control and Prevention tweeted out a link to a new blog post on their website called "Preparedness 101: Zombie Apocalypse." A great marketing idea, we must admit—someone over there has been watching The Walking Dead. The only problem is, the surge of traffic took out their whole blog. And it's still down this morning! (It's since been cross-posted here on a different area of the CDC site.) Now, the power of Twitter to destroy the will of servers is well documented.