reporter: and moments after the hearing ended, the company s head of global policy management tried to put that internal research that instagram may be harmful to teens in a different light. facebook s own research shows that instagram harms teenage girls. how could your company know that, do research on it and ignore it? first, that s not an accurate characterization. with regard to this instagram survey, it s a very small survey of 40 instagram teens who are struggling with mental health issues and they were asked their instagram makes things better or worse for them. and on all 12 issues, the majority of both boys and girls who answer these questions, said that instagram either makes things better for them or has no material impact. let s get right to terry moran, live on the hill this evening. and terry, facebook responding to this testimony today from this whistle-blower, claiming they ve been trying to get more