US President Truman's grandson attends Hiroshima memorial ceremony
6 August 2012 Last updated at 16:49 BST
Japan has marked the 67th anniversary of the atomic bombing of Hiroshima.
This year the grandson of US President Harry S. Truman also attended the ceremony.
Truman had ordered the bombing on August 6, 1945 and the subsequent bombing of Nagasaki three days later.
Tom Santorelli reports.