Francis Hagen, the Facebook whistleblower, leaked internal Instagram research into teenagers and well-being. Her claim is that Instagram is choosing profit over well-being of teenage girls. You've talked about, you have a famously open culture,. which comes with the criticism and the painful experiences. So let me ask you another difficult question. Can you steal man and defend the point? And then help me understand the positive and negative effects of Instagram and Facebook on young people.