 and in the process, kill more than 200,000 Japanese people with only two bombs. In visiting B Reactor, which is where the plutonium was generated, you'll see a facility described as standard 1940s mad scientist stuff, with a doomsday vibe and a nice coat of seafoam green paint. Cheerful signs illustrated with Ziggy-like cartoon characters remind workers to extinguish their cigarettes and leave when an evacuation horn sounds.