Which sentence states a reason that would support a claim in favor of American use of the atomic bomb during World War II? On August 6, 1945, the US Air Force dropped an atomic bomb on Hiroshima, Japan, killing more than 70,000 people. Japan’s surrender came just days after the bombing of Hiroshima, ending the war and saving countless lives. Niels Bohr was one of the many physicists who worked at Los Alamos to develop the atomic bomb. Many scientists, including Albert Einstein, opposed the development and use of further nuclear weapons.