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Da Dang contamination

A Vietnamese soldier guards a contaminated site in Da Nang, Vietnam. During the war, the U.S. military stored millions of gallons of herbicides at an air base there. More than 30 years later, the soil still contains dioxin at unsafe levels. The pollution also has seeped into a nearby lake and moved through the food chain into human blood and breast milk. Tribune photo by Kuni Takahashi
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