Amy Martinez

If you would just remind us about the background against which this is all taking place.

You know, it's interesting, Jane, that both sides seem to be tamping down expectations of any breakthrough today.

So just give us a sense of the state of play and what can be accomplished.

And this demand for no nuclear or ballistic weapons is not all that this administration wants from Iran.

So tell us more about that.

Thank you.

Harvard professor and economist Larry Summers announced he will resign from teaching there later this year.

Suvan Lee from WBUR in Boston is here to tell us more.

Good morning, Suvan.

So catch us up to these developments.

They seem to be happening pretty rapidly.

Can we just clarify here, is he resigning or is he just retiring sooner than perhaps was expected?

Not just Harvard, though.

He had relationships with faculty at other academic institutions, as we recall.

Thank you.

The Cuban government says its border troops engaged in a gunfight with a boat registered in Florida and killed four people on board.

NPR's Eder Peralta is following this story from his base in Mexico City.

Eder, good morning.

So how did this happen?

The Cuban government, as I understand it, released a list of people that they say were on the boat.