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In August 1945, the United States dropped two atomic bombs on Hiroshima and Nagasaki in Japan. This unprecedented, highly destructive weapon, although hastening the end of the war, plunged humanity into a new wave of panic. After World War II, the two major blocs of the East and West launched a nuclear arms race. Following the United States, the Soviet Union, the United Kingdom, France, China, and Israel successively developed nuclear weapons. To this day, nine countries have mastered this technology, with the number of nuclear warheads once reaching as high as 60,000. These terrifying weapons have become the Damocles sword hanging over humanity's head, and any misjudgment, error, or madness could lead to the destruction of human civilization. However, crucial materials such as uranium and plutonium have leaked through various channels, and people have used nuclear weapons to balance each other, even risking to drag each other into the abyss...