"I cannot understand why the world cannot understand the agony of the nuclear bombs," he added. "How can they keep developing these weapons?" In the film, which was screened at the United Nations, Yamaguchi recounts how he was stepping down from a tram around two miles from the hypocentre of the bomb that detonated above Hiroshima. He was temporarily blinded, lost the hearing in one ear and was badly burned on much of his upper body.