Based on the excerpt, what are three reasons President Truman provides for the development and use of atomic bombs by the United States? Atomic bombs caused less destruction and death than other bombs. The Axis powers would have been unstoppable if they had developed the atomic bomb first. The atomic bombs needed to be tested in a real-world war scenario in Asia. The Americans used the bomb to end the war and minimize American casualties. The bombing was necessary to stop aggressive nations that endangered world peace.