From the onset of the U.S. biological weapons program in 1943 through the end of World War II the United States spent $400 million on biological weapons, mostly on research and development. The budget for fiscal year 1966 was $38 million. When Nixon ended the U.S. bio-weapons program it represented the first review of the U.S. biological warfare program since 1954. Despite the lack of review, the biological warfare program had increased in cost and size since 1961; when Nixon ended the program the budget was $300 million annually.
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