Iran and six world powers agreed to a path that would block Tehran from developing nuclear weapons, but key points left unresolved in the marathon negotiations and fierce regional and U.S. political opposition suggested major hurdles remain to reaching a final deal. Officials laid out on Thursday what amounted to goals for a deal by the end of June that would place constraints and controls on Iran’s nuclear work for up to 25 years, with severe limits for the first decade. But it was still unclear how two of the major sticking points in the final days of negotiations would be resolved. One unanswered question was when exactly sanctions would be eased, and the other was how quickly Iran would be able to scale up its nuclear activities after the first decade. Read more http://www.wsj.com/articles/tehran-...-of-deal-for-irans-nuclear-program-1428006137
