Dhaka, Aug. 7 -- Japan marked 80 years since the atomic bombing of Hiroshima on Wednesday with a ceremony reminding the world of the horrors unleashed, as sabre-rattling between the United States and Russia keeps the nuclear "Doomsday Clock" close to midnight.

A silent prayer was held at 8:15 am the moment when US aircraft Enola Gay dropped "Little Boy" over the western Japanese city on August.

On a sweltering morning, hundreds of black-clad officials, students and survivors laid flowers at the memorial cenotaph, with the ruins of a domed building in the background, a stark reminder of the horrors that unfolded.

In a speech, Hiroshima mayor Kazumi Matsui warned of "an accelerating trend toward military buildup around the world", against ...