Facebook whistleblower Frances Haugen testified before the U.S. Congress on Tuesday, telling lawmakers the social media giant knew its apps were harming the mental health of some young users. Here are some comments from the committee hearing:

U.S. SENATOR RICHARD BLUMENTHAL, DEMOCRAT FROM CONNECTICUT

"The damage to self-interest and self-worth inflicted by Facebook today will haunt a generation."

"Big Tech now faces the Big Tobacco jaw-dropping moment of truth."

  - Reuters