A landmark court case is underway in the United States - it involves the impact of social media on the mental health of young people. Mark Zuckerberg, the billionaire founder of Facebook, and one of the biggest stars of big tech is being questioned for the first time in a US court. Read more: https://news.sky.com/story/social-media-trial-latest-mark-zuckerberg-to-appear-before-jury-for-first-time-13508905 #skynews #socialmedia #usnews #unitedstates SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews Follow us on Twitter: https://twitter.com/skynews Like us on Facebook: https://www.facebook.com/skynews Follow us on Instagram: https://www.instagram.com/skynews Follow us on TikTok: https://www.tiktok.com/@skynews Sky News Daily podcast is available for free here: https://podfollow.com/skynewsdaily/ For more content go to http://news.sky.com and download our apps: Apple https://itunes.apple.com/gb/app/sky-news/id316391924?mt=8 Android https://play.google.com/store/apps/details?id=com.bskyb.skynews.android&hl=en_GB To enquire about licensing Sky News content, you can find more information here: https://news.sky.com/info/library-sales