dr. katz, good to have you with us on this saturday afternoon. the former u.s.aily beast, "the best hope to avoid syria becoming a failed or radical islamist state is for the russia and u.s. to cooperate." you write that russia may be shifting its pro-assad position. at this point, do you think that russia leadership and the united states can get together on syria? >> you know, i think that the russians now understand that the regime probably isn't going to survive. however, i don't think that the russians are going to get actively involved with us in any effort to militarily intervene in syria. i think that their hope is to protect their interests, that if there's going to be a new regime, that they keep their investments and naval facilities, but i don't think they're going to join with us in getting involved. >> what do we know about the scope, the size, and the variety of the syrian chemical -- of their chemical weapons stash? >> well, in that -- the syrians, of course, have denied they don't have any. that there's not that public information revealed about