[Xibizopt]

I don't think the US would ever totally disarm as long as their are other countries who aren't willing to disarm. Nuclear disarmament depends on resolving several conflicts (Arab-Israeli conflict, India-Pakistan) because countries involved don't feel safe. Also there are countries who don't face any real threat but are paranoid (Russia?) and they won't commit to total disarmament unless their attitude changes. I think perceived safety is huge: South Africa got rid of its nukes after Cuban forces had pulled out of Angola and the Soviet Union was no longer seen as a threat.