It is SaO2 that measures oxygen saturation of hemoglobin, and it should be clear that it depends on the partial pressure of arterial oxygen. If PaO2 drops, there's less dissolved oxygen, and therefore less saturation of hemoglobin with oxygen.
The Cuban Missile Crisis was a propaganda victory for the United States and an undisclosed blow to containment. Some may contend that since the Soviet Union ultimately fell, the policy of containment was successful. This is an overly generous statement.
President Truman developed a new foreign policy strategy based on the idea of containment. First proposed by George F. Kennan in 1947, the primary goal of this policy was to keep Soviet Union-based communism isolated and to prevent the spread of it to neighboring countries.