SCOTT GALLOWAY: Facebook could screen its advertisers, but it doesn't want to hurt profits

Scott Galloway, a marketing professor at NYU and author of the new book "The Four: The Hidden DNA of Amazon, Apple, Facebook, and Google," discusses Facebook. He says the company has embraced many aspects of a media company, but seems allergic to many of the associated responsibilities. He worries that the youthful management at Facebook doesn't have the historical context for the importance media plays in our society, citing Russia's manipulation of it during the 2016 presidential election. He