'New Yorker' staff writer Evan Osnos talks how Facebook became vulnerable to spreading disinformation, how Zuckerberg is attempting to combat fake news, and the inherent problems in monitoring political content without violating users' free speech. "Over and over again Mark Zuckerberg believed that being at odds with the public was not a sign that you were doing something wrong; it was a sign that you were doing something innovative," Osnos says.