Facebook's moment of reckoning?

Facebook agreed to stop letting advertisers exclude ethnic and religious groups from seeing certain ads on its platform this week, the same week that it lost roughly $120 billion this week as investors sold off stock. So is this a moment of reckoning for Facebook and other social media giants? Plus, we go inside Microsoft's Imagine Cup competition, where 49 students teams pitted advanced technology projects against each other.See omnystudio.com/listener for privacy information.