Russia releases previously classified 1961 footage of largest ever nuclear explosion

Russia has released previously classified 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 on Oct.1961, 4,000 meters over the remote Novaya Zemlya archipelago above the Arctic Circle.
The footage shows an immense fireball and a 60-km high mushroom cloud rising after the explosion lit up the sky.
The views were captured from several angles by cameras installed on the ground and on board two Soviet aircraft.
A documentary featuring the footage was published online for the first time by Russian state nuclear agency Rosatom in August 2020, as part of events to mark 75th anniversary of Russia's atomic industry.