Zuckerberg 'combative' during initial testimony at social media addiction trial

We are keeping a close eye on the landmark social media addiction trial happening right now in Los Angeles. Meta CEO Mark Zuckerberg is currently on the stand testifying in the case centered around whether social media platforms knowingly designed their apps in a way that harms children. Meta and Google's YouTube are the defendants in this case.The companies deny the claims that their products are to blame for mental health issues in children. Joining us now, NBC News business and data correspondent Brian C ...