Nearly everyone fishes for a living on Laos' Don Sadam Island, near the site of the controversial Don Sahang dam. Locals and environmentalists alike are worried about the dam's effects on fish migration. Michael Sullivan/NPR hide caption

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Michael Sullivan/NPR

Damming The Mekong River: Economic Boon Or Environmental Mistake?

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Former Hmong Gen. Vang Pao (right) in May 2000 during a wreath-laying ceremony at the Vietnam Memorial in Washington, D.C. Luke Frazza /AFP/Getty Images hide caption

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Luke Frazza /AFP/Getty Images