Relations were cut off to Cuba after what revolutionary rose to power?

Fidel Castro

Explanation:

In 1959 communist rebel forces under Fidel Castro defeated the U.S. supported regime of Fulgencio Batista leading to Fidel Castro becoming the new Prime Minister of Cuba.

The U.S. in response, cut off all relation to Cuba as they did not want a Communist state so close to the U.S.. America tried to remove Fidel from power through various assassination attempts and even a counter-rebellion not to mention the economic blockade that followed.

nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei the fighting in iwo jima and okinawa affected the allies' pacific strategy because truman decided to drop the atomic bomb on mainland japan.