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Latest on the damning testimony from the facebook whistle-blower that ceo mark zuckerberg is disputing tonight. >> the only way we can move forward and heal facebook is we first have to admit the truth. >> reporter: and the truth, according to frances haugen, is that the social media giant is hiding what it really knows about its impact on its users, including the spread of misinformation. >> facebook likes to paint that these issues are really complicated. facebook prioritized that content on t...

Brian laundries sister pleads for him to turn himself in. and gabby petitos mother said someone needs to start talking about what happened to her daughter. the facebook whistleblower that mark zuckerberg is disputing tonight. >> the only way we can move forward and heal facebook is by telling the truth. >> reporter: and the truth by francis hougan is something they havent admitted. hougan tefrstifying to the sena about what the company did and did not do about the spread of misinformation abov...