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  Need to Know, August 20, 2010

This week on Need to Know: The religious history of lower Manhattan. The U.S. transition in Iraq. And best-selling author Gary Shteyngart, who absolutely loves “weiner dogs.”


  Blood test: What you don’t know about blood

Since World War ll, blood has been considered “the gift of life.” But today a growing number of experts are questioning whether blood transfusions should be so widely used.

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