UN Secretary-General Antonio Guterres will attend the 77th anniversary of the world's first atomic bombing at the annual ceremony at Japan's Hiroshima Peace Memorial. "The ceremony aims to console the souls of those lost to...bombing...pray for...lasting world peace," UN spokesman Stephane Dujarric said. The US dropped the atomic bomb on Hiroshima on August 6, 1945, killing 1,40,000 people.