 During the Second World War and the Nazi occupation of France, Frank wrote for the collaborationist weekly "Les Nouveaux Temps", but he was known as a critic of the collaborationist Vichy government's censorship policies.He also wrote for the French film magazine "L'Écran français", a socialist-leaning magazine founded by the Resistance during the war, which continued after it.The magazine had the backing of French film directors such as Jacques Becker, Marcel Carné, Jean Grémillon, and Jean Painlevé; writer/scenarists Pierre Bost and Jacques Prévert; critics Georges Sadoul and Léon Moussinac; as well as Albert Camus, Henri Langlois, André Malraux, Pablo Picasso and Jean-Paul Sartre.