"Iran will have nuclear weapons. Diplomatically, the United States is unable to stop it. Economically, the United States is unable to stop it. If the United States attacks Iran pre-emptively, Iran will use its oil reserves as leverage to cripple the United States economy, damaging global economies in the process. The international community at large would then pressure the United States to cease all operations against Iran. This paper looks at these issues in-depth while using a scenario-based approach to form a U.S. response to a nuclear-armed Iran. If the United States elects to be proactive in dealing with Iran, it will seek regime change. Yet, the Iranian people have now rallied behind their current regime in the face of U.S. opposition. For this reason and others, the United States must use internal actors in Iran to bring about regime change. Ultimately, the question becomes, how quickly does the regime change need to take place?"--Abstract from web site.