technology causes teenagers. >> kids bullied on instagram, the bullying follows them home. follows them into their bedrooms. >> i think we're going to look back 20 years from now and all of us are going to be like, what in the hell were we thinking when we recognize the damage that's done to a generation of kids. >> reporter: haugen's call to action, it's time for congress to vote to regulate facebook. >> the company's leadership knows how to make facebook and instagram safer, but won't make the necessary changes because they've put their astronomical profits before people. congressional action is needed. they won't solve this crisis without your help. >> reporter: the hearing also took stark aim at facebook's ceo mark zuckerberg who posted a video sailing with his family on sunday, just before haugen exposed some of the company's