Iran Nuclear Talks Said Down to Fine Print Stage Talks between Iran and six world powers seeking to curb Tehran's nuclear program bogged down early Sunday despite the personal intervention by Secretary of State John Kerry and other foreign ministers whose presence had raised hopes for a breakthrough. Diplomats refused to spell out details of the talks, which dragged on past midnight into a fifth day. But both sides suggested negotiations focused on detailed wording that could be key in shaping an agreement that both sides could live with. Iranian Deputy Foreign Minister Abbas Araghchi described the talks as being in "their 11th hour," with most issues resolved but an agreement still elusive. "We have agreed to 98 percent of the draft ... but the remaining 2 percent is very important to us," he told reporters. While he did not specify what was missing, Araghchi said Iran would never accept an agreement that did not in some way acknowledge his country's right to enrich uranium - a key international concern because enrichment can create both reactor fuel and the fissile core of warheads. The goal is to hammer out an agreement to freeze Iran's nuclear program for six months, while offering the Iranians limited relief from crippling economic sanctions. "There are narrow gaps, but they are important gaps," British Foreign Secretary William Hague said about the drafting process, without offering specifics. An agreement would cap nearly a decade of inconclusive international efforts to halt Iran's expanding nuclear program. Iran insists its program is for peaceful purposes and not aimed at building nuclear weapons. A deal would build on the momentum of the historic dialogue opened during September's annual U.N. gathering, which included a 15-minute phone conversation between President Barack Obama and Iran's new president, Hassan Rouhani, after three decades of U.S.-Iranian estrangement. For the U.S. and its five partners, the chief concern is uranium enrichment. Since it was revealed in 2003, Iran's enrichment program has grown from a few dozen enriching centrifuges to more than 18,000 installed and over 10,000 operating. From uranium ore obtained from South Africa in the 1980s and some locally mined ore, the machines have produced tons of low-enriched uranium, which can be turned into weapons grade material. Iran also has stockpiled almost 200 kilograms (440 pounds) of higher-enriched uranium in a form that can be converted in six to nine weeks to fissile warhead material - almost twice as fast as the low-enriched uranium. Its supply is nearly enough for one bomb. While saying they are ready for compromise, the Iranians are mindful of criticism from hard-liners back home who oppose dealings with the United States. Statements on Saturday by senior Iranian negotiators appeared to be an attempt to defuse domestic opposition to a deal that skeptics see as surrendering their country's nuclear sovereignty. "I assure Iranians enrichment will never stop," Iran's state TV quoted Foreign Minister Mohammad Javad Zarif as saying. Iran opposes any demands restricting its rights.'