Tsar Bomb, the world's largest nuclear explosion in 1961

footage of the world's largest nuclear explosion, caused when the Soviet Union detonated the so-called Tsar Bomba almost 60 years ago.
The hydrogen bomb, which carried the force of 50 million tons of conventional explosives, was detonated in a test in October 1961, 4,000 metres over the remote Novaya Zemlya archipelago above the Arctic Circle.