U.S. President Barack Obama may use his Hiroshima visit to urge world leaders to consider the consequences of using nuclear weapons, a close aide said Tuesday.

Deputy National Security Adviser Ben Rhodes said the president will not revisit President Harry Truman's decision to use the atomic bomb in August 1945.

"The tremendous human cost of war in general, that Hiroshima is certainly such a tragic part of but extends across centuries, is something that he'll want to reflect on," Rhodes told a think tank event in Washington.