Yes there was a very ambiguous statement about a secret project, that’s not the same as being read in.
What he was told about could have been a large conventional bomb like the grand slam, tallboy, or firebats which were also secret at the time, there’s a pretty big difference between them. I imagine there was probably quite a bit of hyperbole from secret project directors just as there is today so that’s not a super great metric to judge things on.
You failed to quote the July 25th 1945 entry when he wrote about what he was actually told and shown which is as far as I’m aware the first definitive proof he knew exactly what it was.
You failed to quote the July 25th 1945 entry
That’s Truman’s reaction to the trinity test and is irrelevant to when he was told about the research. Obviously he had a different reaction to the actual bomb compared to a hypothetical bomb, but I would think that would be expected.
