Why do half of the world's firearm deaths occur in just six countries, all in the Americas? What does consistently treating guns as a public health issue entail? Stephen Hargarten and Arturo Cervantes Trejo join Gavin to discuss their work with the Network To Prevent Gun Violence In The Americas. You can continue the conversation with Jessamy and Gavin on Twitter by following them at @JessamyBagenal and @GavinCleaver.