All In with Chris Hayes 05/03/13

Hayes: We need to talk about gun culture

Chris Hayes argues that a "gun culture" that involves designing and marketing firearms to children needs to be re-examined. He is joined by Dan Baum, journalist and author of the book "Gun Guys," and Rep. Elijah Cummings, D-Md., who lost his nephew to ... more Duration: {{video.duration.momentjs}}