She left Facebook concerned, and with copies of thousands of pages of research. Meet the Facebook whistleblower. Scott Pelley reports, 60 Minutes Sunday. | 60 Minutes

Facebook whistleblower Frances Haugen says political parties have been quoted in Facebook’s own research saying they know Facebook changed its algorithm and “now if [they] don't publish angry, hateful, polarizing… content,” there’s less engagement. https://cbsn.ws/3DdzHxw Facebook’s written response to 60 Minutes can be read here: https://cbsn.ws/3a3HQba | 60 Minutes