Country's region for unspecified underground groups." the fbi says it checks databases, telephone communications, online activity. it also actually interviewed tamerlan tsarnaev and family members, but the fbi says it did not find any terrorism activity. so it fwaf that information to russia and asked for, but did not receive, more specific additional info. case closed. >> because additional information didn't come in, the fbi says, for our purposes under our system, with all the records and investigation we're allowed to do here, it hasn't risen to the level to warrant further investigation o...