Agents Trace News Today

Center, michael leiter. in boston, nbc news national investigative correspondent michael isikoff. michael isikoff, start with you and what they got out of these persons of interests homes and out that i have possession, including the computer which could be a treasure atroptrove information? >> right. that would have been all of the evidence in that dorm room of tsarnaev and probably be the one of most interest to the fbi because it would let agents trace who he has been in communication with, w...