Offsettings Combatting News Today

Prove it. nbc news halie jackson has the details. >> reporter: explosive information from a former facebooks employer. >> haugin coming publicly for the first time. before the riot in capitol, facebook turned offsettings combatting the threat of dangerous -- >> as soon as the election was over, they turned it off to prioritize growth over safety. >> reporter: haugen armed with tens of thousands of documents points to an algorithm.