Yik Yak is a an app that allows users to communicate anonymously with anyone within a 10-mile radius. At Colgate University in upstate New York, the anonymity brought out a particularly vicious strain of racism that shook the school.
Reporter Rukmini Callimachi is always looking for new ways to eavesdrop on ISIS operatives online. Recently, she got a new look into how ISIS members might be using the internet to coordinate their attacks. Plus, a new Yes, Yes, No.