Pulitzer Prize-winning journalist and author Rick Atkinson just finished his Liberation Trilogy, a history of World War Two. His final book is called The Guns at Last Light. Atkinson was a longtime reporter on national defense and military issues for the Washington Post, though now he concentrates on his books. He was in Knoxville and told WUOT's Chrissy Keuper that his near-obsession with the Second World War comes from his childhood on military bases…