"Iran's leaders, like those in other states, want to remain in power.  They want the regime in which they have invested and which serves their interests to endure.  Foreign policy, in addition to safeguarding Iran's borders and national integrity, is a means for safeguarding the regime.  Possession of a nuclear weapon will likely make Iran more impervious to attack and may make Iran bolder in its support for armed groups.  However, possessing a nuclear weapon will is not likely to alter Iran's paramount foreign policy goals of national and regime security."