D. d<span>eclared that any Soviet attack on an American ally would be countered by a nuclear attack on the Soviet Union. </span> Dulles presented this policy as a means of deterring the Soviets from pursuing war policies. In his speech in 1954, Dulles said, "The way to deter aggression is for the free community to be willing and able to respond vigorously at places and with means of its own choosing."
This was known as the "iron curtain." It was a term used to describe the boundary in Europe, which formed at the end of WWII and lasted until the ending of the Cold War.
