Informed Americans about international and foreign policy affairs have voiced their frustration about U.S military interventions abroad and the potential for more of such interventions. These frustrations are undoubtedly the results of having been witness to consistent decline in the standards of living by Americans over the past decade, which have sharpened over the past five years in particular. The financial crisis in the U.S. and Europe and the enormous financial burden shouldered by the United States in rebuilding Afghanistan and Iraq have been crucial factors in changing the views of Americans toward U.S. involvement in other countries.
With regard to Iran, it appears that most Americans (69%) view the Iranian military capabilities significant enough to thwart any Western military aggression against the country. A potential military engagement with Iran is a worry to a large number of Americans first and foremost because of the potential it holds in loss of American lives and, perhaps equally, due to enormous financial costs involved, not to mention the damage to American interests in the Muslim world.
What the U.S. needs as an effective policy tool in confronting Iran and its nuclear proliferation threat is a truly concerted effort (not merely confined to a few NATO members) 
in building a unified diplomatic front against Tehran. The more unified a front against Iran, the more effective a change in Iran’s behaviour.
