Iron Curtain
The idea of the Iron Curtain was made public by Winston Churchill, former Prime Minister of the United Kingdom, in 1946 when he was invited to speak at American University by Harry S. Truman (the American president at the time). Churchill's speech was seen by Nikita Khrushchev; leader of the USSR from 1958 until 1964 as a declaration of war, as Churchill urged a struggle against the Soviet Union.