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The Boston Globe

Nation

Data-sharing troubles raise questions in Marathon case

2 separate watch lists named Boston suspect

WASHINGTON — A federal audit as recently as January warned there was a “high risk” that the government’s information-sharing system would not prevent a terror attack, raising questions about whether a communications breakdown allowed the Boston Marathon bomb plot to evolve undetected and its perpetrators to elude quick capture.

The information issue arose again on Wednesday when US officials disclosed that the CIA had placed Tamerlan Tsarnaev on a terrorism watch list several months after the FBI had placed him on a different watch list. Both actions were based on separate alerts provided by Russian authorities, but they failed to help the United States recognize and intervene to head off the threat or identify Tsarnaev as a suspect once the bombs went off.

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