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Rocky Flats workers begin using plutonium to build nuclear weapons triggers.
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A fire at Dow Chemical Co. releases a small amount of radioactive plutonium contamination. The public becomes aware of contaminant releases from Rocky Flats.
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Agents from FBII, Justice Department, and EPA raid Rocky Flats to investigate allegations of environmental crimes.
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Colorado Governor Roy Romer signs an Agreement in Princiiple with the Department of Engergy to fund state oversight of various Rocky Flats health and environmental studies.
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Cleanup of contamination at Rocky Flats begins.