Why did 500,000 Cubans Flee to U.S.

After the Cuban revolution led by Fidel Castro in 1959, a Cuban exodus began as the new government allied itself with the Soviet Union and began to introduce communism. From 1960 to 1979, tens of thousands of Cubans left Cuba, with the vast majority coming from Cuba's educated, landowning upper class.

Explanation:

These are the recommendations that Alabama clergymen  
 (1)All public facilities including schools and lunch counters in Birmingham should be integrated immediately while (2) acknowledging that "the issues are not simple," the signatories want to provide leadership on the basis of knowing "the ultimate spirit in which all problems of human relations must be solved."

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