The 1940s was a watershed decade for American cinema and the nation. At the start of the decade, Hollywood - shaking off the Depression - launched an unprecedented wave of production, generating some of its most memorable classics, including Citizen Kane, Rebecca, The Lady Eve, Sergeant York, and How Green Was My Valley. Hollywood then joined the national war effort with a vengeance, creating a series of patriotic and escapist films, such as Casablanca, Mrs. Miniver, The Road to Morocco, and Yankee Doodle Dandy. By the end of the war America was a country transformed. The 1940s closed with the threat of the atom bomb and the beginnings of the Hollywood blacklist. Film Noir reflected the new public mood of pessimism and paranoia. Classic films of betrayal and conflict - Kiss of Death, Force of Evil, Caught, and Apology for Murder - depicted a poisonous universe of femme fatales, crooked lawyers, and corrupt politicians.