How did the Cold War create the fear and threat of nuclear war in the United States?

Simple Russia had weapons and the U.S had weapons

Explanation:

With both the U.S and The USSR both had nuclear weapons and were both competing for communism vs. Capitalism. Seeing as how the U.S came out on top with the first man to land on the moon it sparked a fire in the USSR leaders to fight fire with fire. Nuclear weapons with Nuclear weapons I should say anyway I hope this helps

The Soviet Union made atomic bombs and it worried alot of people because the United States and the Soviets were the only ones that had a huge amount of A Bombs and many Americans feared that the USSR was beating them in the arms race.

the answer is a, salt plain

uncle sam would be tossing and turning in his grave : *)