Jo Fidgen hears what was happening in the Pentagon and the Kremlin in the final days of the 1962 Cuban Missile Crisis.
The Soviet leader Nikita Khrushchev finally offered to withdraw the missiles as the crisis came to a head.
In 2012, his son Sergei remembered those fraught few days.
(Photo: Nikita and Sergei Khrushchev. Credit: Sergei Khrushchev)