Iran and world powers have started what could be their final negotiations to revive a 2015 nuclear accord that limited the Islamic Republic’s atomic activities in return for sanctions relief. The fifth round of talks has begun in Vienna, with Iranian and Russian officials saying that, while some issues still need to be resolved, it could be the final one. If a deal is struck, the U.S. would probably ease sanctions on Iran’s oil, banking and shipping sectors, though it is unclear to what extent or how quickly that would happen. Iran, whose economy has been battered by the U.S. penalties, is preparing to ramp up crude production and boost exports in anticipation of an agreement. The negotiations have not hit a “dead-end,” Iran’s foreign ministry spokesperson, Saeed Khatibzadeh, told reporters in Tehran […]