Final answer:
The Cuban Missile Crisis focused attention on the nuclear arms race between the United States and the Soviet Union.
Step-by-step explanation:
The correct answer is the Cuban Missile Crisis.
The Cuban Missile Crisis was a crucial event during the Cold War that took place in 1962. It was a standoff between the United States and the Soviet Union over the presence of Soviet nuclear missiles in Cuba. This event heightened tensions between the two superpowers and brought the world to the brink of a nuclear war, making it a significant focus on the nuclear arms race.
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