Another Hiroshima Is Coming — Unless We Stop It Now

When I first went to Hiroshima in 1967, the shadow on the steps was still there. It was an almost perfect impression of a human being at ease: legs splayed, back bent, one hand by her side as she sat waiting for a bank to open. At a quarter past eight on the morning of August 6, 1945, she and her silhouette were burned into the granite. I stared at the shadow for an hour or more, then I walked down to the river where the survivors still lived in shanties. I met a man called Yukio, whose chest was etched with the pattern of the shirt he was wearing when the atomic bomb was dropped. He described a huge flash over the city, “a bluish light, something like an electrical short”, after...