Tsar Bomba, nicknamed 'Big Ivan' by its makers, was the largest nuclear bomb ever built. With a yield of 50 megatons, it was 4000 times more powerful then the bomb that devastated Hiroshima.

This video shows various important aspects of the bomb, including its development at Arzamas-16, the secret Soviet nuclear weapons research facility and its transportation to the Tu-95 bomber, which was painted white for the test to reflect the heat of the blast. Several different views of the explosion are also shown, including several filmed from the air and ground alike. The last few shots are of the ground zero several days after the test.