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Exclusive: Iran’s supreme leader personally set conditions for nuclear deal: Negotiator

It took Iran's Ayatollah, an Arab sultan, secret letters and an American college connection to help seal the historic deal between Iran and the United States.

Iranian Supreme Leader Ayatollah Ali Khamenei attends a meeting with a group of religious performers in Tehran, Iran, April 9, 2015. (Photo by Office of the Iranian Supreme Leader/AP)
Iranian Supreme Leader Ayatollah Ali Khamenei attends a meeting with a group of religious performers in Tehran, Iran, April 9, 2015.AP

Richard Engel