On Sunday, Aug. 4, San Francisco author and photographer Tom Graves discussed his book, "Twice Heroes: America's Nisei Veterans of WWII and Korea," at Palo Alto's Obon Festival. Graves spent a decade conducting hundreds and hundreds of interviews with these aging veterans, gathering the rich stories they had to tell for his book. In an interview with Palo Alto Weekly, Graves describes the struggle of these veterans, as they fought America's war while America interned their relatives.