Barack Obama has become the first serving US president to visit Hiroshima since the World War Two nuclear attack.

Mr Obama said the memory of 6 August 1945 must never fade, but did not apologise for the US attack – the world’s first nuclear bombing.

Mr Obama spoke to two 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 three days later in a second bombing in Nagasaki.