US President Barack Obama is set to make history by visiting the Japanese city of Hiroshima.
Mr Obama will become the first sitting US President to visit the city since an American atomic bomb was dropped there on 6 August 1945, killing 140,000 people.
The president said he will not apologise nor revise or second-guess his predecessor Harry Truman's decision.
Instead, the White House said, the visit will "highlight his continued commitment to pursuing peace and security in a world without nuclear weapons".
The day before Mr Obama's visit Japanese demonstrators gathered at the Peace Memorial Park in Hiroshima, demanding he not attend the site and prompting a heavy police presence.