AMNA NAWAZ: President Trump continued his tour of the Middle East today with a trip to the United Arab Emirates.

The Gulf nation promised significant investment in the U.S. and partnership on A.I.

technology and infrastructure.

Nick Schifrin has that story.

NICK SCHIFRIN: Tonight in Abu Dhabi, the carpet is gray, and the fans were adoring for the president's third state visit in three days, full of pomp and circumstance.

The Emirates' first astronaut gave President Trump a tour of the presidential palace before the UAE bestowed on President Trump its National Medal of Honor, and President Mohammed bin Zayed promised to invest $1.4 trillion in the U.S. in the next 10 years.

MOHAMMED BIN ZAYED AL NAHYAN, United Arab Emirates President (through translator): This partnership has taken a significant leap forward since you have taken office.

DONALD TRUMP, President of the United States: I know you will never leave my side.

I know that.

And you know the special relationship that we have in our country has.

So our country's back with you.

This is an incredible culture.

That, I can say.

NICK SCHIFRIN: All week, President Trump has been showered with the Gulf monarchy's economic and cultural riches, today, the Grand Mosque.

And in return, President Trump has endorsed Gulf priorities, including making a diplomatic deal over Iranian nuclear enrichment.

DONALD TRUMP: Iran has sort of agreed to the terms.

They're not going to make out, I call it in a friendly way, nuclear dust.

We're not going to be making any nuclear dust in Iran.

And we have been strong.

I want them to succeed.

I want them to end up being a great country.

NICK SCHIFRIN: Today's agreements also include a U.S. commitment to share A.I.

technology with the Emirates and for the Emirates to turn away from Chinese technology.

And President Trump promised the Gulf the American military assistance it desires.

DONALD TRUMP: As president, my priority is to end conflicts, not start them.

But I will never hesitate to wield American power if it's necessary to defend the United States of America or our partners.

And this is one of our great partners right here.

NICK SCHIFRIN: But what the president could not accomplish on this trip, a breakthrough over the war in Ukraine after Russia sent a lower-level delegation to peace talks that were supposed to have been with President Zelenskyy.

DONALD TRUMP: I'm not disappointed.

Why would I be disappointed?

We just took in $4 trillion.

And he says that you're disappointed about a delegation.

I know nothing about a delegation.

I haven't even checked.

Look, nothing's going to happen until Putin and I get together, OK?

NICK SCHIFRIN: It's not clear the timing for that possible Trump-Putin meeting, but Secretary of State and interim National Security Adviser Marco Rubio said it will be determined after the president returns to Washington late tomorrow and, Amna, after tomorrow's talks between Russia and Ukraine.

AMNA NAWAZ: So, Nick, we expected those talks today.

Tell us more about what happened there and also what each side is saying ahead of their meeting tomorrow.

NICK SCHIFRIN: It was a bit of a diplomatic dust-up today in Turkey.

The Ukrainian and Russian delegations landed in different cities.

The Russian delegation ended up waiting in Istanbul for a Ukrainian delegation that didn't even show up.

And the two delegations were really lopsided.

Zelenskyy was there in Turkey with his most senior aides, but Putin was a no-show and sent relatively mid-level officials, what Zelenskyy called a decorative group.

Despite all that, tomorrow, Turkey will host the first face-to-face meeting between Russia and Ukraine in some three years, since 2022.

But, as we heard there, President Trump said the deal was only possible if he and President Putin sat in the same room.

And today, we heard that echoed by Secretary of State Marco Rubio.

MARCO RUBIO, U.S. Secretary of State: We don't have high expectations of what will happen tomorrow.

And, frankly, at this point, I think it's abundantly clear that the only way we're going to have a breakthrough here is between President Trump and President Putin.

It's going to require that level of engagement to have a breakthrough in this matter.

I don't think anything productive is actually going to happen from this point forward until they engage in a very frank and direct conversation, which I know President Trump is willing to do.

NICK SCHIFRIN: Now, as for the substance of tomorrow, Russia continued its maximalist stance.

We heard from the Foreign Ministry in Moscow today tying Russian military gains in Ukraine with their diplomatic demands on the table.

And the chief Russian negotiator said today that Ukraine needed to solve the -- quote -- "root causes" of the war.

And Russia has defined that as capping the size of Ukraine's military, Ukraine's ability to get Western support, et al, but also the presence of U.S. and NATO troops in Eastern Europe.

All of that is dead on a rival for Ukraine and the West.

And that led Zelenskyy today to question Russia's commitment to peace.

VOLODYMYR ZELENSKYY, Ukrainian President (through translator): Russia must demonstrate something, either a high level of delegation or a level of leaders or some decisions, something.

If there is no such demonstration, it means that Russia is not ready to talk about the end of the war and to make a decision.

It means that there is not enough political will and it means that Russia does not feel it means to end this war.

NICK SCHIFRIN: And the fact is, Amna, it does not appear that Russia feels the need to end this war.

AMNA NAWAZ: Nick Schifrin, thank you, as always.

NICK SCHIFRIN: Thank you.