Steve,
Sooner or later, if they don't already have one, Iran is going to have nuclear weapons. All of the sanctions and talk in the world won't change that. I feel the real problem is with the United States dismantling many of our nuclear weapons and Russia building new ones and all of these more or less radical countries having them, one of them is just going to have to try them out and then all crap will break loose. With us cutting down on our supply, that just encourages these countries like NK to decide they may be able to get away with anything.
Ron