As a result, the US, though certainly better equipped than Israel for a war to ensure that Iran forever abandons its nuclear ambitions, could nonetheless conclude that that objective is simply too costly. The recent report by The Iran Project, whose signatories include the former US national security advisers Brent Scowcroft and Zbigniew Brzezinski, concluded that an American military attack on Iran could only delay its nuclear program for up to four years.
因此，尽管对于让伊朗永久放弃核野心方面，美国显然比以色列有更好的条件发动战争，但美国极有可能认为这一目标实在成本太高。最新的伊朗报告（Iran Project，署名作者包括前美国国家安全顾问斯考克罗夫特和布热津斯基）指出，美国对伊朗的军事打击最多只能将后者的和进程延缓四年。