Good morning from the Financial Times.

Today is Friday, October 1st, and this is your FT News Briefing.

The recent sell-off in government bonds is sending a message about the global economy,

we'll talk about what it's signaling, and artificial intelligence could improve weather forecasting.

Say you're in a at Wimbledon, tennis, and you want to know when the rain is going to sweep in

and stop play or to cricket match. That can really help scheduling at a short time.

But first, Facebook. It's in the hot seat again after revelations that the company knew that

its social media sites were harming teens and it didn't do anything about it.

And our European Technology Correspondent, Matamita Mergea, says it may be time to turn off

Facebook's digital fire hose of ads. I'm Mark Filippino and here's the news you need to start your day.

Facebook was hammered yesterday by U.S. lawmakers from both political parties.

They hauled the company's global head of safety up to Capitol Hill for questioning.

The hearings were called after a Wall Street Journal investigation revealed that Facebook

knew of the harm it was doing to teens and other vulnerable users. Here's Democratic Senator Richard

Blumenthal. We're here today because Facebook has shown us once again that it is incapable of

holding itself accountable. We now have deep insight into Facebook's relentless campaign to

recruit and exploit young users. Also, it is you is Facebook's advertising. It's the engine

of the company's profits and it's Facebook's advertising algorithms that determine the ads you

see on your social media feed. GFT's Matamita Mergea looked into this and wrote a column that says

despite the company's claims that users can control what they see, people really can't control

what ads show up. Matoo joins me now to talk about this. Hey, Matoo. Hi, hi, Mark.

Matoo, you start your column with a story, a really sad story actually about how these ads can

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