The company’s global head of safety was grilled in a Senate hearing about internal research on Instagram's alleged harm to teens on the platform. READ MORE: https://abcn.ws/3ol7WPf SUBSCRIBE to GMA's YouTube page: https://bit.ly/2Zq0dU5 VISIT GMA's homepage: https://www.goodmorningamerica.com SIGN UP to get the daily GMA Wake-Up Newsletter: https://gma.abc/2Vzcd5j #GMA #Facebook #Instagram #AntigoneDavis