Alert Tracking Potential News Today

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 trackin...