Deportations by train were critical in the Nazis' genocidal vision of the "Final Solution of the Jewish Question." Historians have estimated that between 1941 and 1944 up to three million Jews were transported to their deaths in concentration and extermination camps. In his writings on the "Final Solution," Raul Hilberg pondered the role of trains: "How can railways be regarded as anything more than physical equipment that was used, when the time...