On April 24th 1945, President Harry Truman learnt the full details of the Manhattan Project, in which scientists were attempting to create the first atomic bomb. The information thrust upon Truman a momentous decision: whether or not to use the world’s first weapon of mass destruction.
The Manhattan Project began modestly in 1939, but grew to employ more than 130,000 people and cost nearly US$2 billion (roughly equivalent to $25.8 billion as of 2012). Over 90% of the cost was for building factories and producing the fissionable materials, with less than 10% for development and production of the weapons. Research and production took place at more than 30 sites, some secret, across the United States, the United Kingdom and Canada.
When America’s secret development of the atomic bomb began in 1939, the then-President Franklin Roosevelt’s gave it his full support. The project was so secret that FDR did not even inform his…
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