Diplomats from the U.S. and Iran converged in Vienna on Tuesday in an attempt to revive the beleaguered 2015 nuclear agreement, the first potential thaw in diplomatic relations between Tehran and Washington since the Trump administration left the accord in 2018. American and Iranian officials aren’t meeting directly, but are working through European intermediaries, who also gathered in the Austrian capital alongside representatives from the other parties to the deal, Russia and China. Yet the meeting in Vienna marked a diplomatic breakthrough and was seen by Western diplomats as a necessary first step toward salvaging a deal that put limits on Iran’s nuclear activity in return for sanctions relief. After leaving the nuclear accord, the Trump administration imposed heavy sanctions on Iran. Diplomats hope the new talks could engage Tehran on other issues of […]