the. >> ifill: ron bonjean, jim manley.nk you both. >> thank you. >> woodruff: for the first time in more than 30 years, the most senior diplomats of the united states and iran are talking face to face. secretary of state john kerry and foreign minister mohammad javad zarif, plus other foreign ministers iran's nuclear program and international sanctions against the country. iran's president hassan rouhani says he wants to reach an agreement in three to six months. and this morning at the u.n., he called on israel to join the nuclear non-proliferation treaty and on all nations to abandon nuclear arms. >> ( translated ): a peaceful and secure world remains a shared ideal for us all. the horrors of hiroshima and nagasaki deepened our resolve to prevent the occurrence of such unspeakable death and destruction. no nation should possess nuclear weapons. since there are no right hands for these wrong weapons, the only absolute guarantee is their total elimination. >> woodruff: given the outreach, how should the u.s. proceed? we ge