The great fear of General Leslie R. Groves, the head of the Manhattan Project, was that World War Two would end before atomic bombs were ready to use.
He would would have been pilloried for having presided over a $2 billion boondoggle that used up valuable military resources with no visible result.
Stanley Goldberg, a contributor to Hiroshima’s Shadow, wrote that it was Groves, not President Truman or General Marshall, who gave the order to bomb Hiroshima and Nagasaki.
We’re living with the consequences of the Hiroshima bombing to this day, and I’m reading Hiroshima’s Shadow to try to understand the reasons.
The reason Hiroshima was followed by a second bomb on Nagasaki, according to Goldberg, is that Groves wanted to use both a uranium bomb and a plutonium bomb.
This justified the whole Manhattan Project, not only the Oak Ridge, Tennessee, facility where the uranium bomb was made, but the one at Hanford, Washington, where the plutonium bomb was made.
I’ve long thought that, given the prior U.S. decision to bomb the cities of Germany and Japan, and given the availability of atomic bombs, the argument for using the new weapon was almost irresistible.
The real key turning points were the decision to develop an atomic bomb in the first place, which could easily not have been made, and the project’s success, which also might not have happened.