With military strategist and futurist P.W. Singer. Singer co-authored "Ghost Fleet," the Tom Clancy-style novel of future warfare. But he's a scholar too, and a student of all weapons - including social media. It's been weaponized he says in his new book "LikeWar" in a way that can now decide real wars and real politics. We talk about the fierce battle for what's understood as real in the age of social media.
