possibly linked to tamerlan tsarnaev? >> one of the things that tamerlan tsarnaev did when he left russia was posteo o a rebel commander. now, it is one of his lieutenants, if you will, who was killed in that overnight raid by russian special forces here. there is no concrete proof that tamerlan met this sub commander who was killed in the operation. but it is an indication of the ongoing battle of the russian security forces here are having with the rebels in the mountains. only the day before 20 more rebels killed in another special forces operation. it's all part of a background of what's happening here, but does this have a specific link to tamerlan? we don't know that at this stage. but it does show that the people that he was idolizing and posting on his social networking sites, the people he was idolizing are the people in the