Eisenhower & The Cold War

How did the United States react to the following 7 events, and why?

1. The Soviet Union exploded its first atomic bomb in 1949.
The U.S reacted to the Soviet Unions explosion of their first atomic bomb by beginning and winning the race for the Hydrogen bomb. The U.S also implemented programs to help people survive nuclear fallout. It also entered the policy of brinkmanship. The U.S did the first and last listed in order to deter the Soviets from attacking. The programs were implemented because they were supposed to help people survive if the deterrents weren't enough.
2. In 1951, the Iranian prime minister placed the oil industry in Iran under the Iranian government’s control.
The U.S used the CIA and money lending to the old government counter the new regime. It did this because it feared that without the money from the oil, the new government would ask the Soviet Union for aid.
3. The Guatemalan head of government gave American-owned land in Guatemala to peasants.
The U.S reacted to this by having the CIA train an army and have it invade Guatemala. It did this because it believed the Guatemalan government had Communist sympathies.
4. In 1956, Britain, France, and Israel invaded Egypt and occupied the Suez Canal.
The U.S did not really react to this, however the U.N did act to stop the fighting. The U.S however did initiate this conflict because it did not give a loan to Egypt, which caused it to nationalize the Suez Canal.
5. Soviet tanks invaded Hungary and fired on protesters in 1956.
The United States did nothing about this, despite the Truman doctrine.
6. In 1957, the Soviet Union launched Sputnik.
The U.S responded to the Soviet Union's launch of Sputnik by rushing to develop its own satellite, and did so at the end of January 1958.
7. In 1960, the Soviet Union brought down an American U-2 piloted by Francis Gary Powers.
The U.S responded to this by saying that they would stop the flight, something that they planed to do any way. However they refused to apologize, and the arms race talks with the Soviet Union were canceled.