heather, back to you. takes a coordinated effort. amy kellogg live for us. thank you. >> the fbi is on high alert tracking potential copycat attackers in the wake of the terrorist massacre. the warning coming on the heels of a brand new threat on isis on america. lauren is here with how the fbi is preparing. >> the fbi is trying to quell american fears during the wake of the attack but doing a questionable job. they have uncovered no credible threat here like that in paris and they are tracking dozens of potential terrorists. >> we are not aware of any credible threat here of a paris type attack. we have seen no connection between the paris attackers and the united states. isil and supporters put out all propaganda like videos and magazines but that is not