KEY POINTS
  • At Tuesday's hearing with Facebook whistleblower Frances Haugen, senators on both sides of the aisle asked why CEO Mark Zuckerberg has yet to address the matter.
  • "Mark Zuckerberg ought to be looking at himself in the mirror today," said Sen. Richard Blumenthal, D-Conn., chair of the subcommittee that held the hearing.
  • Sen. Ed Markey, D-Mass., thanked Haugen for her whistleblower actions and called her "a 21st-century American hero."

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As senators absorbed Tuesday's testimony from the Facebook whistleblower, who leaked the company's internal research to reporters, they demanded to hear from the person in charge.

In front of a Senate subcommittee, Frances Haugen, a former product manager at Facebook, said the company repeatedly prioritized profits over user safety. Haugen said she felt compelled to come forward because "almost no one outside of Facebook knows what happens inside Facebook."

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