After Stalin's death in 1953 and a short period of collective rule, the new leader Nikita Khrushchev denounced Stalin's many crimes and atrocities and launched the policy of de-Stalinization, releasing many political prisoners from the Gulag labor camps. The general easement of repressive policies became known later as the Khrushchev Thaw. At the same time, Cold War tensions reached its peak when the two rivals clashed over the deployment of the United States Jupiter missiles in Turkey and Soviet missiles in Cuba.