How Crowd Control Evolves

What does good policing looks like when it comes to managing sometimes bristly human interactions at street protests or in rowdy sports stadiums? Writer Simon Montlake and photographer Alfredo Sosa learned in Columbus, Ohio, how police dialogue units can play a role. But is it sustainable, and transferable? How far might it extend in an era when violence and fear seem sometimes seem more prevalent than an openness to discourse? Hosted by Clay Collins.