Stock Photo - Aug. 6, 2015 - Japan - File - Hiroshima, the city that suffered U.S. atomic bombing in 1945 during World War II, commemorated the 70th anniversary of the bombing at the city's Peace Memorial Park. Pictured: May 15, 1946 - Hiroshima, Japan - Japanese 'Kamikaze' or suicide pilots who were used to attack Pearl Harbor thus pushing the US to use the Atomic Bomb. Nuclear weapons have been delivered only twice in the history of warfare, both in the ending days of World War II; the first bombing was on the morning of August 6th 1945, when the United States dropped a uranium gun-type device code-named 'Little Boy' on the Japanese city of Hiroshima, and the last nuclear bombing occurred three days later; the second bomb was a plutonium implosion-type device code named 'Fat Man', dropped on the city of Nagasaki killing 120,000 civilians and twice that over time died of nuclear diseases. (Credit Image: © Keystone Press Agency/Keystone USA via ZUMAPRESS.com)