Frances Haugen

U.S. lawmakers pounded Facebook on Oct. 5, accusing CEO Mark Zuckerberg of pushing for higher profits while being cavalier about user safety, and they demanded regulators investigate whistleblower accusations that the social media company harms children's mental health and stokes divisions.

Facebook battled dueling crises on Oct. 4 as potentially billions of users were impacted when its dominant social network went offline for seven hours, and the company fought against a whistleblower's damning revelations.