The consequence of a world full of nuclear powers to me is so incomprehensible in terms of the dangers that that implies.

One nuclear war is going to be the last nuclear - the last war, frankly, if it really gets out of hand. And I just don't think we ought to be prepared to accept that sort of thing.

Some day, somebody is going to have to start talking about what happens to us all a decade from now if we let these North Koreans and the Iranians go forward with their nuclear weapons program.

The whole nuclear thing is a terrible mess and it's hard for me to understand why it is that we, the United States, seem to be the only ones that are really particularly concerned about it and prepared to do something.

If we had made it clear from the very beginning that we were not going to tolerate another nuclear power on the face of the earth, and had done it in Korea, where we could have accomplished it militarily, if necessary, I would put a stop to it and would have put a stop to it there.

You can't explain the unknown in terms of the incomprehensible.