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Photo of Tamerlan Tsarnaev at 2010 New England Golden Gloves 2010/ still at large: Dzhokar Tsarnaev, 19
Photo of Tamerlan Tsarnaev at 2010 New England Golden Gloves 2010/ still at large: Dzhokar Tsarnaev, 19

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    Ex-CIA operative: Zero chance Tsarnaevs acted alone

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Ex-CIA operative: Zero chance Tsarnaevs acted alone

Could the Tsarnaev brothers have built the bombs used in the Boston terror attack alone? CNN intelligence and security analyst Bob Baer says likely no.

Ex-CIA operative: Zero chance Tsarnaevs acted alone

Could the Tsarnaev brothers have built the bombs used in the Boston terror attack alone? CNN intelligence and security analyst Bob Baer says likely no.