1 янв 1960 г. - USSR Tests the largest Nuclear Weapon Ever Built

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Known as Big Ivan to the Soviets and as Tsar Bomba in the US, RDS-220 was the largest nuclear weapon ever built. Designed as a 100 megaton hydrogen bomb, its yield was reduced by 50% when it was tested. The device was air-dropped from an altitude just above 34,000 feet over the Mityushikha Bay test site on Novaya Zemlya Island on October 30, 1961.

It detonated at 13,000 feet and its fireball still reached the earth. The blast pressure was measured at 300 psi and the flash of light was visible more than 600 miles away. The mushroom cloud reached an altitude of 210,000 feet.

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