Tracing the suspected bombers' roots

Photo of Tamerlan Tsarnaev at 2010 New England Golden Gloves 2010
Photo of Tamerlan Tsarnaev at 2010 New England Golden Gloves 2010

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    Tracing the suspected bombers' roots

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CNN's Nick Paton Walsh describes the two suspected Boston bombers' background and their roots to the Caucasus region.