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Ceremonies mark 67th anniversary of Hiroshima atomic bomb attack

Kimimasa Mayama / EPA

A survivor of the Hiroshima atomic bomb offers a prayer for victims of the world's first atomic bombing at Hiroshima Peace Memorial Park in Hiroshima, western Japan, on August 6, 2012.

Arata Yamamoto, NBC News reports from Tokyo — As dignitaries from 71 countries joined a crowd of 50,000 on Monday to mark the 67th anniversary of the Hiroshima atomic bomb attack, Japanese officials vowed to revamp energy policies in the wake of the devastating Fukushima nuclear accident.

On Aug. 6, 1945, about 140,000 people were killed by an American atomic bomb that hastened the end of World War II.  Another blast in Nagasaki three days later killed 70,000 more. Read the full story.

Yasuyoshi Chiba / AFP - Getty Images

Paper lantern floats are released into the water during a ceremony for the victims of the atomic bomb in Hiroshima at Ibirapuera park in Sao Paulo, Brazil, on August 5, 2012. The ceremony was synchronized at the same time as 8:15 am Japanese time - the hour that the bomb exploded over Hiroshima 67 years ago. According to the Brazil Hibakusha Association for Peace, 115 victims are said to live in Brazil.

A peaceful gathering in Hiroshima, Japan, as the city commemorates the 67th anniversary of the atomic bomb that was dropped there during World War II. NBCNews.com's Dara Brown reports.

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