Marathon Blast News Today

Is still considered to be at large, at least according to the scanner traffic... we are going fast and loose because the situation is developing right now. >> that sounds absolutely crazy, some of the things you are saying, power down your cell phones. this sounds like something much bigger than a robbery. can you walk us through? we know this started with a policeman at the m.i.t. campus, responding to something there and this escalated into this chase. can you walk us through where we are? >> ...