Federation of American Scientists
The Federation of American Scientists (FAS) was formed in 1945 by atomic scientists from the Manhattan Project who felt that scientists, engineers and other innovators had an ethical obligation to bring their knowledge and experience to bear on critical national decisions, especially pertaining to the technology they unleashed - the Atomic Bomb.
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In the past I used this site extensively, it looks like it has been revamped. It even has nuclear blast and fallout modeling. I know it also had a history of every country, their programs and weapons.
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