Both Tehran and Washington seem to be ready to engage in nuclear talks. So far, years of negotiations have not yielded a major breakthrough. But how does one go about negotiating a complex and difficult topic such as the Iranian nuclear program? Anchor Marco Werman speaks with William Ury, co-founder of the Harvard Negotiation Project and co-author of "Getting to Yes, Negotiating Agreement Without Giving In." He's been an adviser and mediator in several international conflicts.