The Hiroshima bomb, known as "Little Boy" devastated an area of five square miles. The initial blast killed nearly 120,000 people - with the after-effects of radiation killing many thousands more.
Around 60% of the buildings in the city were destroyed. One of which, just 1.1 kilometres from the epicentre of the blast, housed little 8-month-old Koko Kondo who amazingly survived.
Speaking to 5 Live’s Emma Barnett, Koko, who now works as a peace activist, explained how it was decades later before her parents told her the full story of that day and how she felt when she met the co-pilot of the plane which dropped the bomb.
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