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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On Monday, August 6, 1945, at 8:15 AM, the nuclear bomb 'Little Boy' was dropped on Hiroshima by an American B-29 bomber, the Enola Gay, directly killing an estimated 80, 000 people.

在1945年8月6日周一，早上8时15分，美国B29轰炸机艾诺拉盖号把“小男孩”号核弹丢到了广岛，直接弄死了大约8万人。

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Macarthur himself thought that Hiroshima should be re-planned to turn it into an international showcase for exhibiting the link between the bomb and peace.

麦克阿瑟本人认为广岛需要重新规划，成为演绎和平和原爆关系的国际陈列窗。

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"The world will note that the first atomic bomb was dropped on Hiroshima,a military base.

VOA: special.2011.06.23

President Harry Truman announced to the world about the first bomb: "The world will note that the first atomic bomb was dropped on Hiroshima, a military base.

VOA: special.2009.06.14

Data from a global network of sensors indicated that the disintegration of the Russia fireball unleashed nearly 500 kilotons of energy, more than 30 times the energy of the Hiroshima atomic bomb.

WSJ: Russia Meteor Was Largest in More Than a Century

Taniguchi was just 8 years old and just a mile and a quarter from ground zero when the atom bomb hit Hiroshima.

FORBES: Magazine Article

Furthermore, follow-up of women exposed to the atomic bomb at Hiroshima showed that exposure during adolescence (during breast development) carried a much higher risk of breast cancer than exposure later in life.

FORBES: After 40 Years Of Research, What Do We Know About Preventing Breast Cancer?