In 1987, Aaron Elson went to a reunion of the tank battalion with which his father served in World War II. He was so moved by the stories the veterans shared among themselves but often didn't tell their families that he returned with a tape recorder. The rest is history. Oral history.Inspired by Studs Terkel and Stephen Ambrose, Elson has recorded more than 600 hours of interviews with veterans of World War II. His work has been used as source material...