FILE - In this August 9, 1945 file photo, a mushroom cloud rises moments after the atomic bomb was dropped on Nagasaki, southern Japan. On a recent weekend, an 84-year-old survivor of the Nagasaki atomic bombing retraced his movements on a map: the inferno during his 20-kilometer (12-mile) walk home, the “black rain” of falling radioactive particles and how he felt sick days later, in a government-organized program in the western Tokyo suburb of Kunitachi. (AP Photo/File)