Save for later Print Download Share LinkedIn Twitter Earlier this year, after months of negotiations, the US and Iran appeared to be closing in on an agreement to revive the 2015 Iran nuclear deal. However, it subsequently became clear that the two sides remained divided over several critical issues, causing the earlier sense of optimism to evaporate. As things stand today, there's little visibility into when a deal might be reached — or indeed whether an agreement will be possible at all. Below, Energy Intelligence looks into some of the key questions surrounding the talks.