instagram safer but won t make the necessary changes because they have put their astronomical profits before people. reporter: whistle-blower frances haugen insisting congress must act against a company she says is misleading the public, promoting hateful and harmful content, holding its ceo to account in the end the buck stops with mark. reporter: haugen left facebook in may, armed with tens of thousands of internal documents including some she says showing the company knows its instagram app can contribute to eating disorders in teen girls. a characterization facebook has disputed. it s just like cigarettes teenagers don t have good self-regulation they say explicitly, i feel bad when i use instagram and yet i can t stop we need to protect the kids reporter: and to do that, haugen says, facebook must share more about its algorithms which determine what content pops up on your feed incentivized, she says, toward problematic posts. this inability to see into facebook s actu