• A nuclear war would have happened. After many long and difficult meetings, Kennedy decided to place a naval blockade around Cuba.
• The second question is based on your opinion. I think the Cold War is really over. Both leaders recognized each other’s superpowers (President Kennedy, Nikita Khrushchev), and publicly agreed to a deal in which the Soviets would dismantle the weapon sites in exchange for a pledge from the United States not to invade Cuba.
I hope this helps!