The first happened in Uzbekistan, on September 30, 1966 with a blast 1.5 times the strength of the Hiroshima bomb and at a depth of 1.5 kilometers.

第一起是1966年9月30日，在乌兹别克斯坦境内，苏联以1.5倍于日本广岛核爆炸当量的爆炸，在地下1.5千米深的位置堵住了石油泄漏点。

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He remembered reading a story about the nuclear bomb over Hiroshima.

他记得曾读过广岛上空核弹的故事。

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Then tell them that the United States dropped a nuclear bomb on Hiroshima and Nagasaki.

然后告诉他们美国在广岛和长崎各丢下了一枚核弹。

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What did happen was that the Enola Gay, an American B-29 bomber, dropped a uranium-based atomic bomb on the Japanese city of Hiroshima.

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That is equivalent to having been about three-quarters of a kilometre from the epicentre of the bomb that destroyed Hiroshima.

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He also scrawled his signature on the first A-bomb, called "Little Boy, " that was dropped on Hiroshima, Japan, on Aug. 6, 1945.

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