Often remembered simply as the less momentous second atomic bombing, Nagasaki was a separate event from Hiroshima that some historians have a much harder time justifying. Marked by miscalculations before, blunders during and censorship after, the city's (likely completely unnecessary) obliteration was shocking enough that nuclear weapons were taken away from the US military's sole discretion.
For show notes, a transcript and photos, go to manmadecatastrophes.com