AILSA CHANG, HOST:
The Biden administration is taking first steps to reopen diplomacy with Iran. The European Union says it is willing to host a meeting of all the signatories of the 2015 Iran nuclear deal, and the U.S. says it would attend. That is just the start of what could be a complicated job of reviving a deal that the Trump administration deserted. Joining us now to talk about this is NPR diplomatic correspondent Michele Kelemen.
MICHELE KELEMEN, BYLINE: Hi there, Ailsa.
CHANG: Hi. So, first of all, just tell us what happened today.