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Police move in to the area where the suspect was hiding on Friday in Watertown, Massachusetts.
Police move in to the area where the suspect was hiding on Friday in Watertown, Massachusetts.

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    Questions about FBI's investigation

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Questions about FBI's investigation

National security analyst Fran Townsend discusses the sharing of counterterrorism information in government.

Questions about FBI's investigation

National security analyst Fran Townsend discusses the sharing of counterterrorism information in government.