VIENNA—Iran has signaled for the first time that it is willing to accept a modest reduction in nuclear enrichment throughout the duration of a comprehensive nuclear agreement, according to people involved in the talks. Iran’s Foreign Minister Javad Zarif, left, meets with U.S. Secretary of State John Kerry, right, at talks between the foreign ministers of the six powers negotiating with Tehran on its nuclear program in Vienna on Sunday. Associated Press Although Iran’s suggestion isn’t Tehran’s only proposal on the table, and it is very unlikely to be accepted in current form by the West , it is the first time Iran has shown some flexibility on future enrichment rights-—a key obstacle to a deal. The signs of some flexibility come with six days to go before the July 20 deadline for completing a nuclear deal as U.S. Secretary of State John Kerry held a second day of […]