Hello and welcome to World Business Report from the BBC World Service.
I'm Sam Fennick.
Coming up today, the impact of Trump's tariffs, how they're affecting US consumer and investor confidence.
A high stakes meeting in Argentina.
President Javier Millay sits down with the US Treasury Secretary.
What could all that mean for the country's economy?
And as golfer Rory McElroy secures a career grand slam.
That is just some finish.
Absolutely unbelievable.
Can't imagine how Rory thinks.
I am sick of going home for a gin and tonic.
We'll explore what it means for his brand value and the tourist economy of Northern Ireland.
That's all coming up here on World Business Report in the next 30 minutes.
Let's start, though, with a pivotal moment in the tech world, which could reshape social media.
Metta, the tech giant behind Facebook, Instagram and WhatsApp,
faces a landmark legal battle that could lead to its breakup.
Regulators accuse the company of monopolizing social media by acquiring its biggest rivals.
Today was the first day of the court case and our tech correspondent, Lily Jamali, has been following it for us.
So, first of all, Lily, just refresh us.
What's at the heart of this case?