There was never a time when anyone involved in these projects didn't take fallout into account. The thing is that fallout is something that can be controlled(t

There was never a time when anyone involved in these projects didn't take fallout into account. The thing is that fallout is something that can be controlled(to an extent). You can make a nuke that produces a lot of it, or a nuke that produces hardly any. Also(understandably) you don't get any fallout for underground explosions - we've used nukes for closing oil wells for instance, with zero environmental contamination outside of the initial blast zone. That's not me saying that this is a good idea of course. But it's not like fallout wasn't planned for.