Angel and death: Marlene Dietrich, the German actress transformed into a screen icon in the 1930 film The Blue Angel, shows how smoking was once portrayed as the height of sophistication. The image comes from Cancer Wars, a four-part Channel 4 documentary starting on Sunday. The first programme focuses on lung cancer and includes the story of Janet Sachman, a model who advertised Lucky Strike cigarettes in the 1940s, but now has to speak without her larynx. It was removed in an operation for throat cancer.