For many, the growth of weapons of mass destruction was the most worrying part of the cold war between the Soviet Union and the U.S.

Deep differences between political and religious practices in the U.S. and the Soviet Union led to a cold war standoff.

Even though the USSR and the United States fought as allies in World War II, they were enemies in a cold war that lasted over three decades.

The Russians and the Americans never fought against each other directly, but were part of a cold war in which they aided opposite sides and watched them battle.

As resistance to USSR atheists, the U.S. added “Under God” to the Pledge of Allegiance during the cold war standoff between the two countries.