April 24th, 2013
07:34 PM ET

Why Russia warned U.S. repeatedly about Tamerlan Tsarnaev

Tamerlan Tsarnaev's name was entered into U.S. intelligence databases back in 2011, when Russia raised concerns about his activities to the federal government.

But what exactly were the concerns, and what information did Russia actually share with the U.S.? Republican Senator Jim Risch, who serves on the Senate Intelligence Committee, is OutFront tonight.

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