REPORT JUST OUT: Army tested chemical weapons on St. Louis in 1950s

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This undated photo provided by the subject shows St. Louis sociology professor Lisa Martino-Taylor. Martino-Taylor performed a study raising new concerns about secret Army testing during the Cold War that sprayed a potentially hazardous chemical into the air in St. Louis. The tests targeted predominantly black areas of the city. Now, some residents are left to wonder if those tests led to health problems for them and for relatives. (AP Photo/Courtesy Lisa Martino-Taylor)

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