Iran’s main demand in talks aimed at saving its nuclear deal is to be able to sell its oil at the same levels that it did before Washington withdrew from the accord a year ago, an Iranian official said on Thursday. Iran is threatening to go over the maximum amount of enriched uranium it is allowed under the deal in retaliation for crippling U.S. economic sanctions imposed in the past year. It is just days away from that limit, diplomats say, and going over it could unravel the accord. Senior officials from Iran and the deal’s remaining parties will meet in Vienna on Friday with the aim of saving the agreement. But with European powers limited in their ability to shield Iran’s economy from U.S. sanctions it is unclear […]