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Published on Aug 6, 2013
Japan holds a memorial on Tuesday to mark the 68th year since the US bombing of Hiroshima.
The US ambassador to Japan, John Roos, became the first US representative to attend the annual ceremony after America had previously turned down invitations to mark the morning of 6 August 1945, when a B-29 bomber dropped an atomic bomb on the city.
Around 140,000 people were left dead by the blast
