 Complete the following phrase:  Nikita Sergeyevich Khrushchev  11 September 1971 was a Soviet politician who served as the First Secretary of the Communist Party of the Soviet Union from 1953 to 1964 and as chairman of the countrys Council of Ministers from 1958 to 1964. During his rule, Khrushchev stunned the communist world with his denunciation of Stalins crimes and began de-Stalinization. He sponsored the early Soviet space program, and enactment of relatively liberal reforms in domestic policy. After some false starts, and a 