The Atomic Bomb

On December 21, 1938, German scientists Otto Hahn and Fritz Strassman became the first people to successfully split, or fission, a uranium atom. This groundbreaking experiment sent shockwaves throughout the scientific community. On August 2, 1939, at the urging of scientist Leo Szilard, physicist Albert Einstein sent a letter to US President Franklin Roosevelt warning him that Nazi Germany may already be developing this strange and powerful new weapon. As a result, Roosevelt established the Advisory Committee on Uranium in 1939. In the spring of 1941, several British scientists implored Roosevelt to initiate development of an atomic weapons program in the United States, hoping to beat Nazi Germany in the race to develop this new technology.

On August 7, the day after the Hiroshima bomb was dropped, Truman received a telegram from Senator Richard B. Russell of Georgia, encouraging the president to use as many atomic bombs as possible on Japan, claiming the American people believed “that we should continue to strike the Japanese until they are brought groveling to their knees.” Truman responded, “I know that Japan is a terribly cruel and uncivilized nation in warfare but I can't bring myself to believe that because they are beasts, we should ourselves act in that same manner. For myself I certainly regret the necessity of wiping out whole populations because of the ‘pigheadedness’ of the leaders of a nation, and, for your information, I am not going to do it unless absolutely necessary.”

On August 9, the day the Nagasaki bomb was dropped, Truman received a telegram from Samuel McCrea Cavert, a Protestant clergyman, who pleaded with the president to stop the bombing “before any further devastation by atomic bomb is visited upon her [Japan’s] people.” Two days later, Truman replied, “The only language they seem to understand is the one we have been using to bombard them. When you have to deal with a beast you have to treat him as a beast.”

One week later, on August 14, 1945, after the second atomic bomb was dropped on Nagasaki, the Japanese surrendered. World War II, the deadliest conflict in human history, with between 50 and 85 million fatalities, was finally over.

Looking back, President Truman never shirked personal responsibility for his decision, but neither did he apologize. He asserted that he would not use the bomb in later conflicts, such as Korea. Nevertheless, given the same circumstances and choices that confronted him in Japan in 1945, he said he would do exactly the same thing.

It was heavy burden to bear. Speaking of himself as president, Truman said, “And he alone, in all the world, must say Yes or No to that awesome, ultimate question, ‘Shall we drop the bomb on a living target?’” Every president since Harry Truman has had that power. None has exercised it.

Many National Park Service sites were either directly involved in the quest to create the bomb or to honor those who lost their lives to it.