HIROSHIMA, Japan — The survivors of the world’s first atomic bomb attack are used to hearing grand vows to rid the world of nuclear weapons. They just don’t usually come directly from the leader of the country that dropped the bomb on them in the first place.
On Saturday, a day after Barack Obama left, there was gratitude — wonder, even — that he had become the first sitting U.S. president to visit the place where the nuclear age began. But there was also clear-eyed recognition that the realities of a dangerous, fickle world may trump Obama’s call for na...
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