>> facebook and cambridge analytica have blamed cogan for the misuse of the data. cogan says he's being made a scapegoat by those companies. after the scandal broke, members of congress questioned facebook's ceo mark zuckerberg about the company's data practices, including collecting information on non-facebook users. >> facebook has detailed profiles on people who have never signed up for facebook. yes or no? >> congressman, in general, we collect data of people who have not signed up for facebook for security purposes to prevent the kind of scraping that you were just referring to. >> these are called shadow profiles? is that what they have been referred to by some? >> congressman, i'm not familiar with that. >> okay. let's take a closer look at this. how does the social media platform collect data on non-facebook users? facebook told the technology news website recode that it gets browsing history data from websites and apps that use facebook services including