little to nothing to stop it. ignoring employee concerns about human trafficking, possibly misleading its own oversight board and so much more. >> any parent, anyone that's interested in our democracy, no matter what party they're part of, you start to see the harm. you start to see the injury. you start to see the fact that they are putting profit, and that is based on polarized and algorithms that promote polarized speech and angry speech, they put that ahead of this nation. that's a fact. >> you can expect to see additional documents reported out over the coming weeks. among the new revelations, how easy and quickly it is to be poisoned by disinformation on facebook. here's cnn's donie o'sullivan. >> reporter: how does your facebook feed become so politically polarized? in the summer of 2019, facebook ran an experiment to find out. it created a fake account for a 41-year-old mom living in north carolina. they called her carol smith.