Yes, when they built the first nuclear bomb, they scattered uranium all over the place in order to hide it, but they knew they were going to come back for it one day. Little did they realize that those tricky residents would start sucking up uranium atoms. Now that they got it, how can you make more bombs?
Seriously, there is no greater mess than all the old bomb sites, scattered over North America. In those days, it was fun stuff to play with! Still, the levels are very low, and there is no greater amount of cancer there, than downtown Toronto (cough, cough!).
I sure hope this doesn't slow down my plans to make Port Hope the nuclear waste capital of the world!