In my opinion, a nuclear Iran could actually lead to NORMALIZATION of relations with the United States. The sanctions would be lifted since ostensibly the sanctions were placed to prevent Iran from becoming a nuclear power. Once Iran is a nuclear power, it becomes pointless to have those sanctions. And nuclear weapons prevents wars....it doesn't cause them. How many wars have there have been between US and Soviet Union? US and China? India and Pakistan frequently had wars against each other but once both went nuclear, they were careful not to escalate. As far as Pakistan, yes, that is the primary threat. It's a next door neighbor. It's primary ally in the Middle East is Iran's biggest rival. And Pakistan has also funded terror groups that have attacked Iranians. This is not to excuse the funding of terror organizations by the IRI but two wrongs don't make a right. The shah had stated that he would go nuclear if Pakistan went nuclear. And the stability of Pakistan is questionable. In addition, Russia, has traditionally warred with Iran as well. However, I disagree with you that the W administration never considered invading Iran. I think if Iraq went well, Iran would probably have been next. Didn't Dick Cheney say something like "real men go to Tehran" or something?