Hello everyone and welcome to Amunpur. Here's what's coming up. It's the British Prime

Minister's turn in the Oval Office, trying to shore up his country's celebrated special

relationship and convinced President Trump not to give up on Ukraine. The former British ambassador

to Washington, Sir Peter Westmacott, joins us.

Then, Ukrainian President Volodymyr Zelensky is also headed to the White House to make his case.

His former defense minister Olexey Resnikov joins us.

And, author David Kessler, tells Michel Martin, why he's worried the world is becoming grief illiterate. Welcome to the program, everyone.

I'm Christiana Manpur in London.

Sykia Stama goes to Washington.

The British Prime Minister meets the American president to try his hand at keeping Trump engaged in the transatlantic alliance.

And crucially, to make sure Ukraine has a winning hand in any negotiations to end Putin's war.

So the stakes are sky high with European security and indeed prosperity in the balance.

Stama has come bearing the gift of increased defense spending

to try to trade for an American

security guarantee for Ukraine.

And the Europeans are willing to put boots on the ground in any ceasefire.

It'll be a challenge President Trump has already waived off a U.S. security guarantee,

saying we're going to have Europe do that.

And the Kremlin insists that all regions it currently

occupies and has annexed are non-negotiable. As for fears of a transatlantic trade war,

here's what Trump said about Europe at this week's cabinet meeting. We have made a decision.

We'll be announcing it very soon, and it'll be 25%, generally speaking,

...