Thank you for the opportunity to help you with your question!
Because if they didn't drop the bomb there is a chance that more soldiers will die if they continue to fight with Japan on land. Iwo Jima was enough evidence to show Truman that this war can not go any longer or else more American soldiers will die.
Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 3rd, 2015
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