The Katyn massacre, carried out by the Soviet NKVD in 1940, was only one of many unspeakable crimes committed by Stalin's ruthless executioners over three decades. The mass murder of thousands of Polish officers was part of a relentless purge, the secrets and details of which have only recently been partially revealed.
Georgy Maximilianovich Malenkov (6 December 1901 [O.S. 23 November 1901]– 14 January 1988) was a Soviet politician who briefly succeeded Joseph Stalin as the leader of the Soviet Union. However, at the insistence of the rest of the Presidium, he relinquished control over the party apparatus in exchange for remaining Premier and first among equals within the Soviet collective leadership. He then became embroiled in a power struggle with Nikita Khrushchev that culminated in his removal from the premiership in 1955 as well as the Presidium in 1957. Description above from the Wikipedia article Georgi Malenkov, licensed under CC-BY-SA, full list of contributors on Wikipedia.