FBI , CIA criticized for not keeping better track of Tamerlan Tsarnaev before attack . Bruce Schneier : Connecting the dots seems easy in hindsight , but in real life , it 's not . Comment: Schneier : If a terrorist plot succeeds , it does n't mean law enforcement systems failed .
FBI , CIA criticized for not keeping better track of Tamerlan Tsarnaev before attack . Bruce Schneier : Connecting the dots seems easy in hindsight , but in real life , it 's not . He says there are an enormous number of potential bad guys . Schneier : If a terrorist plot succeeds , it does n't mean law enforcement systems failed .