Iran and six world powers made little progress this week in talks on ending their dispute over Tehran’s nuclear program, U.S. and Iranian officials said on Friday, raising doubts over the prospects for a breakthrough by a July 20 deadline. After three months of mostly comparing expectations rather than negotiating compromises, the sides had intended to start drafting a final agreement that could end more than a decade of enmity and mistrust and dispel fears of a wider Middle East war. “We believe there needs to be some additional realism,” a senior U.S. official said on condition of anonymity, declining to provide details on what issues had caused the most difficulty. “Time is not unlimited here.” “In any negotiation there are good days and bad days, there are ups and downs, this has been a moment of great difficulty but one that was not entirely unexpected,” […]