The chances of reviving the Iran nuclear accord are dwindling and the “moment of truth” has arrived for Tehran’s leadership, German Chancellor Olaf Scholz said Saturday. “We now have the chance to reach an agreement that will allow sanctions to be lifted. But if we do not succeed very quickly, the negotiations risk failing,” Scholz told the Munich Security Conference. “The Iranian leadership has a choice. Now is the moment of truth.” The 2015 Iran nuclear agreement had offered Tehran sanctions relief in exchange for curbs on its nuclear program, but the US unilaterally withdrew in 2018 under t…