FILE - In this May 25, 1984 file photo, guided by then-Hiroshima Mayor Takeshi Araki, former President Jimmy Carter carries a wreath to place at the memorial cenotaph, a monument that contains the names of those who died in the 1945 atomic bombing of Hiroshima, western Japan. In a moment seven decades in the making, President Barack Obama this month will become the first sitting American president to visit Hiroshima, where the U.S. dropped an atomic bomb during World War II, decimating a city and exploding the world into the Atomic Age. (AP Photo/Katsumi Kasahara, File)