him. the f.b.i. releasing a strong statement. >> in 2011, the russian government asked the f.b.i. to investigate the brother because he was a follower of radical islam and a strong believer and changed to leave to the united states to join unspecified under ground groups. the f.b.i. found no evidence of terrorist activity. that is creating unease at the bureau. >> there is a lot of pal paitations in the f.b.i. about what they saw when they looked at this and what did they miss. that will be scutinized. >> tonight fox news is told that the f.b.i. is working through a long laundry list and the former member of the february fib task force said the volume . explosives require a significant and sustained training, shepherd.