“He may have been the one, or someone on his team, that said they wished we would have waited a few more days to drop the 2nd bomb on Japan so that Japan may have evaluated and surrendered after one bomb.”
They did wait. After seeing the effects of the first bomb, President Truman WOULD NOT let them drop the second one until millions of phamphlets had been dropped advising the citizens to leave the area.
https://www.pbs.org/wgbh/americanexperience/features/truman-leaflets/
Didn’t know that, thanks Spunky.