International relations expert Yvonne Davis talks about the next step in the FBI investigation of the Chechen brothers Dzhokhar Tsarnaev and Tamerlan Tsarnaev.
Expert Explains Next Step In Boston Marathon Investigation
International relations expert Yvonne Davis talks about the next step in the FBI investigation of the Chechen brothers Dzhokhar Tsarnaev and Tamerlan Tsarnaev.