"Facebook Doesn't Sell Your Data. It Sells You": Zeynep Tufekci on How Company's Profit Really Works

Facebook CEO Mark Zuckerberg faced off with lawmakers in a marathon 5-hour hearing Tuesday about how the voter-profiling company Cambridge Analytica harvested the data of more than 87 million Facebook users, without their permission, in efforts to sway voters to support President Donald Trump. We speak with Zeynep Tufekci, associate professor of information and library science at the University of North Carolina at Chapel Hill. She is also a faculty associate at the Harvard Berkman Klein Center for Internet & Society. Her book is titled "Twitter and Tear Gas: The Power and Fragility of Networked Protest."