What was a Cold War situation that adversely affected millions of Americans?

One significant Cold War situation that adversely affected millions of Americans was the fear and impact of nuclear proliferation and the threat of nuclear war. The Cuban Missile Crisis in 1962 heightened this anxiety, as the U.S. and the Soviet Union came perilously close to nuclear conflict, leading to widespread panic and civil defense preparations across the country. Additionally, the pervasive culture of fear and suspicion fostered by McCarthyism resulted in the persecution of individuals, including many innocent citizens, who were accused of communist sympathies, causing social and psychological distress.