This weekend marks a year since the tragic shooting at a Tucson meet-and-greet held by U.S. Representative Gabrielle Giffords. 22-year-old Jared Lee Loughner killed six people and injured eighteen, including the congresswoman, who was shot in the head. Thursday, Doug is joined by journalist Tom Zoellner, an Arizona native and friend of Giffords. Zoellner has just published a book that asks this question: what does the shooting tells us about the Grand Canyon State and life in America?