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.
History & Culture. Containment was a foreign policy of the United States of America, introduced at the start of the Cold War, aimed at stopping the spread of Communism and keeping it 'contained' and isolated within its current borders, otherwise the 'domino effect' would occur, where if one nation became Communist, the surrounding ones would follow.