VIENNA – Efforts to bring the United States back into the 2015 deal on Iran's nuclear program are to step up a gear on Tuesday as Iran and the five world powers remaining in the accord meet in Vienna while the U.S.
is due to start indirect talks with Tehran. Friday's announcement that Washington and Tehran would begin indirect talks through intermediaries was one of the first signs of tangible progress in efforts to return both nations to the terms of the accord, which bound Iran to restrictions in return for relief from U.S.
and international sanctions. Then-President Donald Trump pulled the U.S. out of the accord in 2018, opting for what he called a maximum-pressure campaign of stepped-up U.S.