I wonder if any of those 60-80k people were non-cambatants?
Allied POW's will tell you of their Japanese-Christian guard's life-saving favors when nobody was looking.
I seriously doubt the accuracy of that number.
Fat man was dropped purposely on the industrial area where there would be as few civilian casualties as possible. The plan was to take out Japans aircraft and ship building capability.
I guess it depends on what your definition of non-combatant is. Two of the dead were my wife's aunt and cousin. Rice farmers from the countryside who picked the wrong day to go the big city.