In this Saturday, Aug. 5, 2017, photo, organizers of a peace prayer event light up torches on floats on the Motoyasu River next to the Atomic Bomb Dome in Hiroshima, western Japan, on the eve of the 72nd anniversary of the first U.S. atomic attack that killed 140,000 people in the city. Hiroshima's appeal of "never again" on the anniversary Sunday has gained urgency as North Korea moves ever closer to acquiring nuclear weapons, showing its growing prowess with increasingly frequent missile launches. (AP Photo/Mari Yamaguchi)
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