When it comes to John F. Kennedy's assassination on November 22, 1963, there has been many conspiracy theories on how Kennedy died. People believe that the US government has been keeping the truth away from public light, leading to Americans not trusting the government. One of these theories dealt with the Cuban Missile Crisis. Cuba was a communist country at the time, the Cuban mob and the CIA worked together for a time to take the communist government down. Unfortunately the CIA and Cuban mob failed to do this. Because they failed at their revolution, they were now in danger against the communists in Cuba. These events lead to one of the theories as to who killed Kennedy and why.
In the 1950s, many people in the USA were still afraid of communism. It led to McCarthyism with the paranoia and witch hunts. But it was not enough. In 1952, Dwight D. Eisenhower was elected US president after Harry Truman. His plan to stop communism was the Eisenhower Doctrine. Eisenhower's was similar to Truman's doctrine. It was considered the thing that began the process of the US stopping the spread of communism. With this, Eisenhower promised to end the Korean War. This started the 'doctrine of containment around the world. It included Latin America, New Zealand/Australia, Southeast Asia and the Middle East.
The US tried to prevent the spread of communism with the Truman Doctrine and the Marshall Plan in 1947. The Truman Doctrine began when Great Britain pulled from Greece. To prevent the spread of communism, the US pledged to give Greece and Turkey 400million dollars. The US hoped that this would contain the situation. In 1947, secretary of state George C. Marshall had an idea to give aid to countries in western Europe to help them rebuild. This was called The Marshall Plan. When this happened, 16 countries applied for the aid and it was given out over four years. Luckily, this also limited the expansion of communism.