he was a militant from azerbaijan. the better known name here is del gato. what's killed back in december with a very violent firefight in an apartment block not far from where i'm standing. we've seen video you that. intense firefight in which an armored personnel carrier was used to finish it off. he was the head after group of kind of militants here. what we don't know is did tamerlan and him ever meet. we have no confirmation of that at all. what we are asking of course now is why did tamerlan post a video of this man on his youtube channel. of course we should point out that this man -- >> nick, can you talk to me