Two former Meta employees are testifying about child safety research they say was buried by the social media giant. Washington Post Staff Writer Naomi Nix and Roger McNamee, former advisor to Mark Zuckerberg, join Katy Tur to explain more. Our next MSNBC Live event is on October 11th in New York City! Buy Tickets Now: msnbc.com/live25 For more context and news coverage of the most important stories of our day click here: https://www.msnbc.com/ » Subscribe to MSNBC: https://www.youtube.com/msnbc