Answer:Bombing of Hiroshima
Step-by-step explanation:
I feel like the bombing of Hiroshima was the start of destruction in the world, after the bombing the whole world knew what kind of power the US had. That started the ARMS race which led every country trying to top each other off with masss desrtuctive weapons. If every country launched their nuclear bombs, there wouldnt be a world anymore. It scares me to think it could have happened.