In May 2016, a handshake in Hiroshima between a sitting US president and a hibakusha, or atomic bomb survivor, became front page news. The survivor, Sunao Tsuboi, was in his 20's when the atomic bomb hit. He just barely escaped death, and for years afterward, he was consumed by hatred of America. But a chance meeting led to a change of heart. He has since dedicated his life to ridding the world of nuclear weapons while fighting the aftereffects of radiation. At 92, his journey for peace goes on.