5. The Atomic Bomb and Hiroshima/Nagasaki
In 1945, the world witnessed the harrowing power of nuclear weapons as the U.S. dropped atomic bombs on Hiroshima and Nagasaki. Tens of thousands perished instantly, and countless more suffered in the aftermath. Japan’s surrender soon followed, but the bombings sparked enduring controversy over their necessity and morality. This event not only ended World War II in the Pacific but also ushered in the nuclear age, reshaping global politics. For more, see the Atomic Heritage Foundation.
