Reply #5: You're partially correct [View All]

[sprockets]

Naturally Truman had advisors like any president, but as
evidenced in his own diary, he made the final decision himself-
http://www.dannen.com/decision/hst-jl25.html

From the site-
President Truman told his diary on July 25, 1945, that he had ordered the bomb used.
Emphasis has been added to highlight Truman's apparent belief that he had ordered the bomb dropped on a "purely military" target, so that "military objectives and soldiers and sailors are the target and not women and children."

I find the second part of that excerpt rather hilarious, for it proves one of two things...either Truman was truly the "stupid" one,
or he thought he'd play the "Oops, well would you look at that!
Who could've figured, those scientist gentlemen gave me the idea the bomb would have been much better behaved."