On August 6^th, 1945, the United States detonated a 5-ton nuclear weapon over Hiroshima, Japan.  The result helped end WW2 in the Pacific Arena as Japan surrendered less than one month later, but it was devastating to the city of Hiroshima and its immediate surroundings.   Approximately 100,000 Japanese perished in the blast and about 5 square miles of the city were obliterated as ground temperature reached above 1800⁰ C in the firestorm that followed.