For years, top officials at Facebook have been aware of the platform's adverse impacts on users, and they've turned a blind eye to company employees who've tried to push for change. That's according to a new Wall Street Journal investigation that uncovered internal documents suggesting the company willfully disregarded reports that it's harming teens' mental health and failing to stop the spread of misinformation. In a blog post, Facebook said the investigation deliberately mischaracterized the company's actions and "conferred egregiously false motives" on its leadership. We'll talk to the reporters behind the investigation about what they learned.

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