A hundred thousand people were killed by the atomic bomb. Survivors wonder why they lived when so many others died.Photograph from Rolls Press / Popperfoto / Getty I—A Noiseless FlashAt exactly fifteen minutes past eight in the morning, on August 6, 1945, Japanese time, at the moment when the atomic bomb flashed above Hiroshima, Miss Toshiko Sasaki, a clerk in the personnel department of the East