answer:
three key events of the cold war were containment of russia, arms race between the united states and russia, and development of the hydrogen bomb
explanation:
additionally,
- the sputnik crisis was the american reaction to the success of the sputnik program
- it was a key cold war event that began on October 4, 1957 when the soviet union launched sputnik 1, the first artificial earth satellite.
- the launch of sputnik i rattled the american public.
