Artist Joe Sacco talks with NPR about his latest book, The Great War: July 1, 1916: The First Day of the Battle of the Somme. It’s a 24 foot panorama of one day. “Each panel in the panorama is dense and detailed. Fresh troops march in looking eager for battle. Some soldiers eat and relax, while others man the huge howitzers that fire on the Germans. Eventually troops begin advancing, and the chaos of war consumes them.”