On September 30, 1999, technicians at Tokaimura nuclear plant in Japan accidentally caused a horrific chain reaction that changed the lives of everyone around them, including themselves. The man closest to the accident, Hisashi Ouchi, would suffer the worst consequences of all, becoming the most radioactive man in history - a title literally no one has ever wished for. Yet he was kept alive for months, even when he wanted to die…how did this happen? Check out today's insane new video to relive one of the worst accidents in history!