The dark heart of the Nazi holocaust, Treblinka was an extermination camp where over 800,000 Polish Jews perished from 1942. Only two men can bear final witness to its terrible crimes. Samuel Willenberg and Kalman Taigman were slave labourers who escaped in a dramatic revolt in August 1943. One would seek vengeance in the 1944 Warsaw Uprising, while the other would appear in th...