What is the most important to least important the formation of the CIA, Korean War Truman Doctrine, policy of brinkmanship occupation zones in Germany, “iron curtain”, development of the H-bomb, Eisenhower Doctrine, Southeast Asia Treaty Organization (SEATO), Marshall Plan Policy of Containment, Suez Crisis Launching of Sputnik, North Atlantic Treaty Organization (NATO) Berlin Airlift, “Red Scare” U-2 Spy Plane Incident, policy of massive retaliation