Good evening. I'm Amna Nawaz. Jeff Bennett is away. On the news hour tonight, the U.S. and Iran worked

toward a deal to end the war, but obstacles remain, and both sides suggest a breakthrough is not imminent.

The Pope calls for stronger regulation of artificial intelligence in a sweeping manifesto focused on the potential dangers to humanity.

And Judy Woodruff looks at a statewide effort in Ohio to identify the final resting places of thousands who fought in the Revolutionary War.

These gravesites will not live on forever, but to be able to document them is the best thing

we can do, because that will outlive all of us.

Welcome to the NewsHour. On this Memorial Day, Iranian and U.S. officials agree progress to end the war has been made, but how much remains uncertain. President Trump suggested this weekend that a deal was close, before saying that the U.S. is in no rush to reach an agreement.

As negotiations resumed today in Doha with a visit by senior Iranian officials,

Iran acknowledged agreement on many points, but said the signing of a deal was not imminent.

Nick Schiffren's been tracking the statements and updates, and he joins us here now.

So, Nick, let's start with the U.S. The president was very positive over the weekend about the

potential for a deal. What did he say today? He was very much on the fence about the possibility

of a deal today. This is what he wrote on True Social this morning. It will only be a great deal

for all or no deal at all. Back to the battlefront and shooting, but bigger and stronger than ever before, and nobody wants that.

But as you said on Saturday, he wrote that an agreement had largely been negotiated,

and that led to prominent public criticism from Israel and some Republican allies that want to restart the war.

So what's in the deal?

Senior administration official brief reporters this weekend, a European and a regional official,

confirm that this is the outline of the deal as it is right now.

In the first phase, Iran would open the Strait of Hormuz and the U.S. would end its blockade.

Number two, the war would end, including Lebanon. We'll talk, Omna,

more about that in a moment. And the third phase is in principle agreements. Iran limits its nuclear

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