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.
containment - a policy of creating strategic alliances in order to check the expansion of a hostile power or ideology or to force it to negotiate peacefully; containment of communist expansion was a central principle of United States' foreign policy from 1947 to the 1975.