Lianne Dalziel, the Mayor of Christchurch, New Zealand, joins Christiane Amanpour to discuss the aftermath of the shooting at mosques on Friday. Christian Picciolini, the author of "White American Youth" and the founder of the Free Radicals Project talks about his experience turning his back on his white supremacist past. Henry Singer, the Co-director of "The Trial of Ratko Mladic" discusses the process of making the documentary. Our Walter Isaacson talks to musician and actor Steven Van Zandt about his Rock and Roll Forever Foundation and his new album, "Summer of Sorcery". via Knit