I was slightly curious that Von Neumann appeared at this meeting. The Wikipedia page about him has some more information[0]. Most notably, it states that:

I was slightly curious that Von Neumann appeared at this meeting. The Wikipedia page about him has some more information[0]. Most notably, it states that: Von Neumann oversaw computations related to the expected size of the bomb blasts, estimated death tolls, and the distance above the ground at which the bombs should be detonated for optimum shock wave propagation and thus maximum effect. The cultural capital Kyoto, which had been spared the firebombing inflicted upon militarily significant target cities like Tokyo in World War II, was von Neumann's first choice, a selection seconded by Manhattan Project leader General Leslie Groves. [0] https://en.wikipedia.org/wiki/John_von_Neumann#Nuclear_weapons https://en.wikipedia.org/wiki/John_von_Neumann#Nuclear_weapo...