Peiter Mudge Zatko follows Frances Haugen as the second tech whistleblower in less than a year to testify before Congress about the struggles inside a social media company.
Internal Facebook documents show how the pro-Trump Stop the Steal movement proliferated on the world's biggest social network between the presidential election and the Jan. 6 insurrection.
More and more tech workers are publicly criticizing their companies. But those who have spoken out say it's taken a toll on their careers, friendships and mental health.
Facebook is banning some types of content that degrades, sexualizes, and otherwise harasses elected officials, celebrities, activists, and journalists.
Former Facebook employee Frances Haugen electrified Washington on Tuesday with testimony about how the company knew about potential harm to users and decided to hide that information.