Who emerged as leader of the Soviet Union after Joseph Stalin's death?

The Soviet leader who came to power after the death of
Joseph Stalin was a man named Nikita Khrushchev.  Stalin died in 1953 and Khrushchev
took power right after that.  He remained in power until he was thrown out of power in
1964.

Khrushchev was the leader of the Soviet Union through
some of the most important events of the Cold War.  For example, he was the leader
during the building of the Berlin Wall.  Perhaps more importantly, he was the Soviet
leader who decided to put nuclear missiles in Cuba, leading to the Cuban Missile Crisis
in 1962.  It was partly as a result of this that he lost power.