TOKYO -- As Russia's invasion of Ukraine has the world on edge regarding the potential use of nuclear weapons, Hiroshima on Saturday marked the 77th anniversary of the atomic bomb that killed some 140,000 people in the western Japanese city.
U.N. chief Guterres cites Ukraine war; says 'humanity is playing with a loaded gun'

People observe a moment of silence near the Atomic Bomb Dome in Hiroshima on Aug. 6. © Kyodo
TOKYO -- As Russia's invasion of Ukraine has the world on edge regarding the potential use of nuclear weapons, Hiroshima on Saturday marked the 77th anniversary of the atomic bomb that killed some 140,000 people in the western Japanese city.