1956 – The U.S. military releases mosquitos infected with yellow fever over Savannah, Georgia, and Avon Park, Florida. Following each test, Army agents posing as public health officials test victims for effects.
1965 – Prisoners at the Holmesburg State Prison in Philadelphia are subjected to dioxin, the highly toxic chemical component of Agent Orange used in Vietnam. The men are later studied for development of cancer.
1966 – U.S. Army dispenses Bacillus subtilis variant niger throughout the New York City subway system. More than a million civilians are exposed when Army scientists drop light bulbs filled with the bacteria onto ventilation grates.
1990 – More than 1,500 six-month old black and Hispanic babies in Los Angeles are given an “experimental” measles vaccine that had never been licensed for use in the United States. CDC later admits that parents were never informed that the vaccine being injected into their children was experimental.
1994 – Senator John D. Rockefeller issues a report revealing that for at least fifty years the Department of Defense has used hundreds of thousands of military personnel in human experiments and for intentional exposure to dangerous substances.
1995 – The U.S. government admits that it had offered Japanese war criminals and scientists who had performed human medical experiments salaries and immunity from prosecution in exchange for data on biological warfare research.
1995 – Dr. Garth Nicolson uncovers evidence that the biological agents used during the Gulf War had been manufactured in Houston, Texas, and Boca Raton, Florida, and tested on prisoners in the Texas Department of Corrections.
1996 – The Department of Defense admits that Desert Storm soldiers were exposed to chemical agents.
1997 – Eighty-eight members of Congress sign a letter demanding an investigation into bioweapons use and Gulf War syndrome.