Airs Sunday, July 12, at 6 p.m. This year the 5 permanent members of the UN Security Council plus Germany negotiated an interim nuclear accord with Iran that includes limiting Iran's enrichment capacity and stockpile. Many in the U.S. fear that a deal as it is being negotiated would not go far enough and, instead of being a benefit, would strengthen Iran’s hand in the Middle East. Is this agreement a “once-in-a-lifetime opportunity” to halt nuclear proliferation, or does President Obama have this wrong? The debaters are Philip Gordon, Michael Doran, Thomas Pickering, and Mark Dubowitz.