Hiroshima Observes Atom Bomb Anniversary -- Scene at the anniversary service victims of the atom bomb explosion on Hiroshima seven years ago. Anniversary of the fall of the atom bomb on Hiroshima seven years ago was observed there recently. The Nakanoshima Park, which was the centre of the blast, was the scene of a memorial service for the 57,900 odd identified victims. Five a-bomb orphans unveiled a memorial. August 14, 1952. (Photo by Paul Popper, Paul Popper Ltd.).