River apparently hit by a tornado. An urgent rescue operation new under way. Im wolf blitblitzer. Youre in the situation room. A suspect under surveillance by an fbi led Terrorism Task force is shot dead in boston after allegedly waving a large military knife at officers. Along with two associates believed to have been radicalized by isis. This comes as the senate voted 6732 to back a measure reforming a Controversial National Security Agency surveillance method trying to track tire riss through americans phone records. Ill speak live with congressman adam shift of the Intelligence Community and our correspondents analysts and guests are standing by. Lets begin with elise laf itch. Shes in boston on the scene. Whats the latest on this man and his links to terror . Reporter well the Boston Police department and fbi just wrapped up a press conference a short time ago. They tell us that they were watching 26yearold usaama rahim for some time. Its as long as two years as part of this task