We knew the world would not be the same ... "Now I have become Death, the destroyer of worlds"...I suppose we all thought that, one way or another.J. Robert Oppenheimer, director of the Manhattan Project
History
In 1933, Leó Szilárd proposed that free neutrons could be used to start a chain atomic reaction. In 1938, Otto Hahn and Fritz Strassmann found barium in a uranium solution bombarded with neutrons. The next year, World War II started, during which the United States undertakes the Manhattan Project. It produced the first working nuclear weapons (atomic bombs), one of which dropped on Hiroshima, Japan and another on Nagasaki (pictured above). These attacks caused Japan to surrender, ending the War.