They secretly documented life in Amsterdam during the last year of the war: the group of photographers who came to be known as The Underground Camera. Guided by German – Jewish filmmaker Fritz Kahlenberg and resistance leader Tonny van Renterghem, they captured images of both the Nazi occupiers and the Dutch resistance groups. They extensively photographed the grueling conditions of the Hunger Winter, and smuggled their illegally taken photos to London to convince the Dutch government-in-ex...