Hello, you're listening to the free edition of the world in brief from The Economist.

As a reminder, if you subscribe to The Economist, you'll get access to a deeper look at the day ahead, updated three times a day.

If you're already an Economist subscriber,

visit Economist.com slash espresso or visit our espresso app to start listening. Here's today's

free edition.

This is the world in brief from The Economist.

Our top stories.

NVIDIA's share price fell by 17%,

wiping more than $589 billion from the American chipmaker's market value.

The biggest daily decline of a public company.

The tech-heavy NASDAQ index dropped by more than 3%.

Investors reacted to reports that Deepseek, a Chinese artificial intelligence firm,

can train models to get similar results to those achieved

by American rivals but using fewer chips. Some fear this will cut demand for AI hardware. America's

Justice Department sacked more than a dozen lawyers who worked on criminal prosecutions against Donald Trump.

The cases in which Mr. Trump was charged with election interference and mishandling classified documents

were led by Jack Smith, the special counsel, who has already resigned. A DOJ spokesman

told media outlets that James McKenry, the acting attorney general, does not trust those officials to faithfully implement the president's agenda.

The Rwanda-backed M23 rebels in the Democratic Republic of Congo, marched into the east city of Goma after assaulting it on Sunday.

The Congolese government, which insisted that its troops still controlled the majority of

Goma, accused Rwanda of declaring war and cut diplomatic ties.

Paul Kagame, the president of Rwanda, and Felix Chizikadi, his Congolese counterpart, agreed to hold talks on Wednesday.

...