FILE- In this Aug. 6, 1945, file photo, aboard the cruiser Augusta, President Harry S. Truman, with a radio at hand, reads reports of the first atomic bomb raid on Japan, while en route home from the Potsdam conference. On two days in August 1945, U.S. planes dropped two atomic bombs, one on Hiroshima, one on Nagasaki, the first and only time nuclear weapons have been used. Their destructive power was unprecedented, incinerating buildings and people, and leaving lifelong scars on survivors, not just physical but also psychological, and on the cities themselves. Days later, World War II was over. (AP Photo, File)