US troops sprayed far more dioxin over wartime Vietnam than they admitted at the time, according to new research.
Between 1961 and 1971, herbicides such as Agent Orange and other weapons of mass defoliation were used to strip mangrove swamps and forests of cover for Vietcong forces and deprive the enemy of food by destroying crops.
Jeanne Mager Stellman, of Columbia University in New York, and colleagues report in the journal Nature today that a fresh look at US military data has revealed that an extra 7m liters of dioxin-containing herbicide was sprayed over key regions of the war-torn country…
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