The chief of the world’s nuclear weapons watchdog organization considers five years of U.S. and international efforts to rein in Iran’s nuclear ambitions a failure, as Tehran moves ever closer to obtaining the means to develop weapons of mass destruction. The United Nations Security Council has imposed three sets of sanctions to try to get Iran to halt uranium enrichment and other activities, while the United States and Europe have offered economic and security incentives. Yet Iran continues acquiring nuclear technology and stockpiling sensitive material.
