On August 6, 1945, at 8:15 in the morning, the Japanese city of Hiroshima became the first target in history of an atomic bomb. The event not only ended a world war but also began a new era in human existence—one defined by the power to destroy civilization in an instant. The bombing of Hiroshima was more than a military act; it was a scientific milestone, a moral dilemma, and a turning point in the global balance of power.
The Path to the Atomic Age
The origins of the Hiroshima bomb lay in the feverish scientific race of the early 20th century. The discovery of nuclear fission in 1938 by German physicists Otto Hahn and Fritz Strassmann revealed that splitting uranium atoms could release enormous amounts of energy. Alarmed by Nazi Germany’s potential to weaponize this discovery, the United States launched the Manhattan Project—a secret wartime initiative that gathered the brightest scientific minds, including J. Robert Oppenheimer, Enrico Fermi, and Niels Bohr.
By 1945, after years of research and unprecedented collaboration between science and the military, the United States had created two types of atomic weapons: one using uranium-235, called Little Boy, and another using plutonium-239, called Fat Man. Hiroshima was chosen as the target for Little Boy because it was a major military and industrial center that had not yet been heavily bombed, providing an opportunity to measure the full impact of the new weapon.
The Morning of August 6, 1945
At dawn, a B-29 bomber named Enola Gay, piloted by Colonel Paul W. Tibbets, departed from Tinian Island carrying the 4,400-kilogram uranium bomb. The sky above Hiroshima was clear, making it ideal for visual targeting. At precisely 8:15 a.m., Little Boy was released from an altitude of about 31,000 feet. It detonated roughly 600 meters above the city, unleashing an energy equivalent to around 15 kilotons of TNT.
The explosion produced a fireball more than a kilometer wide, with temperatures near its center reaching 4,000 degre ...
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