Iran talks are not near breakthrough yet, Britain's Hammond

By Parisa Hafezi and Arshad Mohammed VIENNA (Reuters) - Nuclear talks between Iran and six major powers are not near a breakthrough yet and foreign ministers will come and go to try to maintain momentum toward a deal, British Foreign Secretary Philip Hammond said on Thursday. Iran is in talks with the United States and five other big powers, Britain, China, France, Germany and the United States, on an agreement under which Tehran would curtail its nuclear program in exchange for relief from econ