On Friday, U.S. President Barack Obama will become the first American president to visit the Japanese city Hiroshima. The visit is a huge event both the USA and Japan. Hiroshima is the first city the world to suffer atomic weapons. The bomb that U.S. forces dropped the city August 1945 killed an estimated 140,000 in that year. Many historians say it helped bring an end the Second World War. Others say it should never have happened. President Obama said his visit is to focus the future. An advisor to the president said Mr Obama would not apologise the bombing. The advisor said Obama, "will offer a forward-looking vision" that focuses the shared future the USA and Japan.
Barack Obama hinted 2009 that he would one day like to visit Hiroshima. His trip the city has got many people Japan and the USA talking the bombs that fell Hiroshima, and later Nagasaki, which killed so many people. Mr Obama said his visit would be a time to think how horrible war is and to remember the terrible loss life. He said he hoped his time Hiroshima would remind people that war causes unnecessary death and that nuclear weapons should never be used again. He said: "Part my goal is to recognise that innocent people caught in war can suffer tremendously." He added: "And that's not just the thing the past. That is happening today many parts the world."