Um, and that minor incident at the Bikini Island Atoll. Entire island nation loses their homes permanently and a bunch of people get cancer and die within a couple of years. But you know, you want to make an omelette, you need to break a few eggs. The USA and the USSR were doing open-air testing until nearly 1960, when the USA finally screwed the pooch hard in the south pacific. And then there was that time some jackass decided to detonate a nuclear bomb in the Van Allen Belt. That was in the mid 60's and for a year or so you couldn't launch anything without it being disabled by the trapped radiation. There was some concern that we'd ended space exploration permanently. But you know, minor little whoops there, no need to mention that in history class.