I think the United States, and other world powers, realize that a nuclear holocaust would destroy us all. That's exactly why there were treaties made by the UN that prevent countries for possessing nuclear weapons. If a nation doesn't have nukes, it can't use nukes.

The whole problem is that because the world powers have nukes, every other country in the world believes they have a right to have them as well. Sure, it seems only fair. But here's a true a cliché, life isn't fair.