The Most Deadly Job in America -And What Happens Next

At one time, the job of astronaut was the deadliest job in America, right after the Apollo 1 disaster, and possibly again after Challenger and Columbia. But there are a lot more astronauts now. We have only had 44 US presidents, and eight of them have died in office. What happens when a sitting president is no longer able to serve is a process that has undergone many band-aid fixes over the years, and is now so complicated that CGP Grey has to explain it to us. (via Digg)