Japan-US relations: In a flash, a changed world: Remembering Hiroshima - Reuters

 A sad moment in history. Since World War Two, no country except the US has attacked another with a nuclear weapon. But at least eight have developed them. More than 2,000 nuclear weapons have been detonated in experiments since 1945.

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Reuters Graphic: In a flash, a changed world: Remembering Hiroshima - Reuters