Read the following passage and answer the following questions:
The Cuban missile crisis was a high point of what came to be known as the Cold War. The cold War referred to the competition, the tensions and a series of confrontations between the United States and soviet Union, backed by their respective allies. Fortunately, it never escalated into a hot war, that is a full-scale war between these two powers.
a. Why was the Cuban missile crisis considered as a high point of Cold War?
b) mention any two contentious issues between USA and USSR?
c) name any two military alliances formed by the USA during the Cold War?