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It was during the Second World War that the United States became a world power, thanks in a large part to its monopoly on atomic weapons. The is a weapon with great explosive power that results form the sudden release of energy upon the splitting, or fission of t ....

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.... could be used as a weapon to release an awesome burst of power. Szilard knew that this knowledge was now in the wrong hands of the enemy Germans. On a July day in 1939 Szilard and his associate, Edward Teller, drove to the Long Island home of Albert Einstein to alert him of their findings. Einstein used his political influence by immediately writing a letter to President Roosevelt explaining the consequences of the Germans creating an . His letter read, "I believe, therefore, that is my duty to bring to your attention that it may become possible to set up a nuclear chain reaction in a large mass of uranium by which vast amounts of power and large qu ....