Having now acquired MGM's library of 2,200 films made before 1986, Turner had them syndicated on his nationwide television stations. When broadcasting their older films, he aired colorized versions of ones originally shot in black-and-white. Opposition arose from cinephiles, actors, and directors to Turner's colorization efforts. Film critic Roger Ebert wrote on Turner's broadcasting of a colorized "Casablanca", "that will be one of the saddest days in the history of the movies. It is sad because it demonstrates that there is no movie that Turner will spare, no classic however great that is safe from the vulgarity of his computerized graffiti gangs." Thanks in part to Turner's colorization, the Library of Congress established the National Film Registry with the aim to preserve American films in their original format.