President Trump announced that he has decided to exit a multinational agreement in which Iran agreed to limit its production of nuclear weapons material. The decision raises questions about stability in the Middle East and questions abroad about whether or not the U.S. can stick to its promises. This episode: Congressional correspondent Susan Davis, national political correspondent Mara Liasson, and chief international editor Will Dobson. Email the show at email@example.com. Find and support your local public radio station at npr.org/stations.