Claude Lanzmann discusses the long and difficult process of researching, shooting, editing and presenting his groundbreaking and influential documentary Shoah (1985).Claude Lanzmann discusses the long and difficult process of researching, shooting, editing and presenting his groundbreaking and influential documentary Shoah (1985).Claude Lanzmann discusses the long and difficult process of researching, shooting, editing and presenting his groundbreaking and influential documentary Shoah (1985).