This statement was contained in a letter from Nikita Khrushchev to President Kennedy in 1962: "An act of aggression propelling h
umankind into the abyss of a world nuclear-missile war." To what is Khrushchev referring in this statement? a. the establishment of Soviet missile sites in Cuba
b. the building of the Berlin Wall separating East and West Berlin
The correct answer is D. the US naval blockade around Cuba. The US tried to overthrow Fidel Castro in Cuba, which was unsuccessful. After that, the Soviet Union struck a deal with Castro in order to place their missiles in Cuba. The US response to that was to block Cuba from all sides until the USSR missiles are returned to them.