here's the quote. i told oppenheimer it would be a great mistake to use the bomb generals cities of japan. well, don't you think that if we tell the russians what we intend to do and use the bomb in japan, the russians will understand it? they'll understand it only tool well, jilad replied. brigadier general clark, who was the military intelligence officer preparing for preparing intercepted japanese cables, quote, when we didn't need to do it and we knew we didn't need to do it, and they knew that we didn't need to do it, we used them as an experiment for two atomic bombs, unquote. this is quoted in "the decision