U.S. Ambassador to Japan John Roos, center, and Hiroshima Mayor Tadatoshi Akiba , left, pray for the victims of the atomic bombing at the Memorial Cenotaph for A-Bomb Victims at Peace Memorial Park in Hiroshima, western Japan, Sunday, Oct. 4, 2009. AP Photo logo AP Photo 2 months ago

U.S. Ambassador to Japan John Roos, center, and Hiroshima Mayor Tadatoshi Akiba , left, pray for the victims of the atomic bombing at the Memorial Cenotaph for A-Bomb Victims at Peace Memorial Park in Hiroshima, western Japan, Sunday, Oct. 4, 2009.