A New Assessment of the Threat from Iran

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The CIA says Iran is not trying to build nuclear weapons any more, but President Bush says it's still a real threat to the rest of the world. The latest National Intelligence Estimate: how does it look to America's friends and potential enemies? Also, with the first voting less than a month away, five Republican candidates have a shot at primary victories. We hear about religion and immigration.  Will the campaigns be affected by the news on Iran?

White House photo: Joyce N. Boghosian