Witness Hiroshima Mark the 70th Anniversary of Atomic Bombing

Members of the police force walk through the Hiroshima Peace Memorial Park in Hiroshima, Japan, on Aug. 5, 2015.

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People crowd around to lay flowers at the Hiroshima Peace Memorial after the 70th anniversary ceremony of the atomic bombing of Hiroshima at the Hiroshima Peace Memorial Park, on on Aug. 6, 2015.

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A woman prays at the Hiroshima Peace Memorial ahead of the 70th anniversary ceremony of the atomic bombing of Hiroshima at the Hiroshima Peace Memorial Park, on Aug. 6, 2015.

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A woman overlooks the ceremony site at the Hiroshima Peace Memorial Park, on Aug. 5, 2015.

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People wait to float candle lit lanterns to commemorate the 70th anniversary of the atomic bombing of Hiroshima at the Hiroshima Peace Memorial Park, on Aug. 6, 2015.

Chris McGrath—Getty Images

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A boy floats a candle lit paper lantern on the river in front of the Atomic Bomb Dome during 70th anniversary activities, commemorating the atomic bombing of Hiroshima at the Hiroshima Peace Memorial Park, on Aug.6, 2015

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A young girl prays after floating a candle lit paper lantern on the river during 70th anniversary activities, comemorating the atomic bombing of Hiroshima at the Hiroshima Peace Memorial Park, on Aug. 6, 2015

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The Atomic Bomb Dome is seen at sunset in the Hiroshima Peace Memorial Park, on Aug. 5, 2015.

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By TIME Photo

August 6, 2015 1:18 PM EDT