Hiroshima on Wednesday marked the 80th anniversary of the U.S. atomic bombing of the western Japanese city, with many aging survivors expressing frustration about the growing support of global leaders for nuclear weapons as a deterrence.

Thousands of people have gathered in Hiroshima to commemorate the 80th anniversary of the world’s first wartime use of a nuclear bomb – as survivors, officials and representatives from 120 countries and territories marked the milestone with renewed calls for disarmament.