LAURENCE REES: What was the single greatest turning point of the war?
MARY FULBROOK: Well you can find all sorts of telling points can’t you? I mean there are several very obvious candidates. One is the invasion of the Soviet Union, one is the declaration of war on the USA.
LAURENCE REES: But you can only pick one?
MARY FULBROOK: The declaration of the war on the USA. But I could say the invasion of the Soviet Union.