ARI SHAPIRO, HOST:
Talks to revive the 2015 nuclear deal between Iran and world powers have never gone smoothly, and that's been especially true in recent days. The war in Ukraine distracted the countries involved, just as it seemed a deal might be near, and Iran made a new demand - that the U.S. drop its terror designation of a powerful wing of Iran's military. NPR's Peter Kenyon reports the issue is putting years of diplomatic work to the test.
PETER KENYON, BYLINE: The Biden administration still believes the 2015 nuclear agreement is worth restoring, as a means of ensuring that Iran doesn't acquire a nuclear weapon. But in New York, as the U.S. this month assumed the rotating presidency of the U.N. Security Council, Ambassador Linda Thomas-Greenfield told reporters that diplomacy is not the only avenue Washington is prepared to pursue.