AQA A Level History Depth Study: The Cold War, c1945-1991 November 2021 question paper 7042/2R

With reference to these sources and your understanding of the historical context, assess the value of these three sources to an historian studying summit diplomacy in the years 1985 to 1988.

How important was the Marshall Plan to the growth of Cold War tensions by 1949?

To what extent did McCarthyism influence American foreign policy in the years 1950 to 1955?

‘The threat of nuclear war declined significantly in the years 1963 to 1968.’

Assess the validity of this view.