After the tragic events at the Boston Marathon, a hero in a cowboy hat emerged. Carlos Arredondo was identified as helping Jeff Bauman in a now-iconic photograph appearing on front pages around the world. In 2006, Eugene Richards began photographing Arredondo, an anti-war activist, after he lost his first son in Iraq — eventually publishing his story in War is Personal. Richards spoke to LightBox about his relationship with Arredondo.