Making history in Korea, Facebook posts that led to real-world violence, and the 'incel' movement

As Facebook gains more and more users in places like Myanmar and Sri Lanka, the company has been criticized for being too slow to remove hateful content, or posts that have sparked real-world violence. Plus, the two Koreas prepare for what could be a truly historic summit. And we hear about the 'incel' (involuntary celibate) movement, which might have motivated the man allegedly behind the van attack in Toronto.