So it is 6.30 a.m. and it has just stopped raining.

I am waiting outside a.

courthouse trying to get into this trial that is happening today.

Yesterday morning, our colleague Megan Babrowski was in Los Angeles.

She was there for a landmark trial and to watch testimony from a very high-profile witness.

Meta CEO Mark Zuckerberg is supposed to testify,

and Mark Zuckerberg is going to be defending himself

and the actions of his company today in court.

The key questions hanging over Zuckerberg's testimony?

Is social media designed to be addictive?

And is it harmful to teenagers?

Last week, the plaintiff's attorney, Mark Lanier, spoke about the case on Fox business.

Well, we slapped a subpoena on Mark Zuckerberg on purpose because we've got documents with his name

that he authored that we believe show he put profits over the safety

of children.

Lanier represents a 20-year-old woman who claims that she was harmed by social media use as a child.

And we're going to put him on the stand and I'm going to grill him on him.

Meta, which is the parent company of Facebook and Instagram, said in a statement prior to

the trial start that the plaintiff's lawyers will, quote, try to paint an intentionally

misleading picture of meta with cherry-picked quotes and snippets of conversations taken out of

context.

This trial, which is being heard by a jury, is the first of its kind and the first of thousands

...