A Japanese student looks at a video of 1945 atomic bombing in front of a photograph showing Hiroshima city after the bomb, at Hiroshima Peace Memorial Museum in Hiroshima, western Japan, August 5, 2015, on the eve of the 70th anniversary of the world's first atomic bombing of the city. Japan will mark on Thursday the 70th anniversary of the attack on Hiroshima, where the U.S. dropped an atomic bomb on August 6, 1945, killing about 140,000 by the end of the year in a city of 350,000 residents. REUTERS/Toru Hanai