What do the films Casablanca, This Is Spinal Tap and West Side Story have in common? They have all been deemed "culturally, historically or aesthetically significant" by the Library of Congress and listed in the National Film Registry. This roll call of American cinema treasures reflects the diversity of film and the American experience itself. The current list of 550 films includes selections from every genre—documentaries, home movies, Hollywood classics, avant-garde, newsreels and silent films. Go behind the scenes to see the discussions, debates and drama that surround this selection process. Clips from America's most-beloved films remind us why film endures as one of the most important mediums of art and entertainment and show us how American cinema is truly our "family album."