 Complete the following phrase:  Paul first travels to Hiroshima on August 6, 1945 and attempts to warn a Hiroshima police captain about the atomic bomb, but the captain dismisses him as insane. Paul then travels to a Berlin hotel room to assassinate Adolf Hitler in August 1939 immediately before the outbreak of World War II the following month, but is interrupted when a housekeeper knocks on his door and later calls two SS guards to his room. On his third stop, Paul tries to change the course of the Lusitania on May 6, 1915 to avoid being 