The bottom line is that Iran continues to delay the West, in a crisis that began when secret Iranian nuclear plants were uncovered in 2002. Since then, Iran has reacted to the leverage applied against it by increasing its atomic work. It claims the right to enrich under the nuclear Non-Proliferation Treaty, and that same logic would give it the right to increase the level of enrichment. Washington's current strategy of holding out for engagement while moving toward sanctions may not be enough to break this cycle. In addition, matters are complicated with uncertainty about how fast to go in dealing with a regime whose legitimacy is challenged by a stubborn opposition movement. The United States may be trapped into a stillborn policy of doing too little, too late if it seriously seeks to rein in Iran's nuclear ambitions.