Barack Obama has become the first serving US president to visit Hiroshima since the World War Two nuclear attack, the BBC reports.
Mr Obama said the memory of 6 August 1945 must never fade, but did not apologise for the US attack – the world’s first and only nuclear bombing.
Mr Obama spoke to a number of survivors and in an address called on nations to pursue a world without nuclear weapons.
At least 140,000 people died in Hiroshima and another 74,000 two days later in a second bombing in Nagasaki.
Mr Obama first visited the Hiroshima Peace Memorial Museum before walking to the Peace Memorial Park, accompanied by Prime Minister Shinzo Abe.