Despite a history of important and successful productions, the industry has often been characterised by a debate about its identity and the level of European and Russian influence. Ukrainian producers are active in international co-productions and Ukrainian actors, directors and crew feature regularly in Russian (Soviet in past) films. Also successful films have been based on Ukrainian people, stories or events, including Battleship Potemkin, Man with a Movie Camera, Winter on Fire: Ukraine's Fight for Freedom, Everything Is Illuminated.