The Atomic Bomb Dome is seen at dusk through the cenotaph at the Hiroshima Peace Memorial Park in Hiroshima, Hiroshima Prefecture, southern Japan, Thursday, May 26, 2016. U.S. President Barack Obama is to visit Hiroshima on May 27 after the Group of Seven summit in central Japan, becoming the first serving American president to do so. (AP Photo/Shuji Kajiyama)