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.
For the most part, the United States was pretty successful in preventing the world-wide spread of Communism. In the 1940s, Joseph Stalin of the Soviet Union wanted Communism to be much more widespread, and basically wanted to overtake the region. At this time, the United States stepped in and put many successful programs in place that helped to contain the rising threat of Communism.