Hardball with Chris Matthews 04/23/13

Could Tamerlan Tsarnaev's wife hold key information?

WNBC’s Jonathan Dienst gives the latest on what investigators are learning about Tamerlan Tsarnaev’s wife; then Katie Zezima of the AP discusses if Katherine Russell knew anything that could help explain the motives behind last week’s Boston bombings. ... more Duration: {{video.duration.momentjs}}