instagram is that first childhood cigarette. facebook is in the process of hiding. reporter: in a rare show of bipartisanship, lawmakers hammered facebook. how can parents trust you? reporter: .using the company s own data against it. leaked researched indicated about a third of teen girls, who already feel bad about their bodies, say facebook s instagram makes them feel even worse. this research is a bombshell. this research is a bombshell. i ask you to commit that you will make full disclosure all of the thousands of pages of documents. we are looking for ways to release more research. reporter: facebook s global head of security antigone davis testified a day after the company did release more research, showing that roughlye research 40% of users in the u.s. say their ideas of a perfect image, feeling attractive, and having enough money started on instagram. she says lawmakers are focusing on the wrong information.