We still don't know why a 20-year-old from Pennsylvania opened fire on Trump last weekend. Lone shooters whose paths from normalcy to vigilantism seem esoteric, obscure, or perverse have become a familiar pattern—but there's actually a lot we do understand about the origins of political violence. Max sits down with terrorism scholar J.M. Berger to understand the psychology of violent extremists and what role the internet plays in their decision to act. But first! Max is joined by the New Yorker's Jessica Winter to talk about the online fandom around Vice President Kamala Harris and the true meaning of the coconut emoji.