Facebook CEO Mark Zuckerberg speaks to CNNMoney’s Laurie Segall after the news broke this weekend that Cambridge Analytica accessed information from 50 million Facebook users without their knowledge. LAURIE SEGALL, CNN SENIOR TECHNOLOGY CORRESPONDENT: I want to start with just a basic question, Mark. What happened? What went wrong? MARK ZUCKERERG, FACEBOOK CEO: So this was a major breach of trust, and I’m really sorry that this happened. You know, we have a basic responsibility to protect people's data. And if we can't do that, then we don't deserve to have the opportunity to serve people. So, our responsibility now...