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.
However, the policy of containment came under attack due causalities and economic issues that the policy created. One of the major effects that over extended the powers of American foreign policy is that it gave the US a reason to interfere with any war they wanted as long as it involved communism.