then they started to say that they were using sophisticated ground to aramis siel systems. and after that we heard there were missiles coming from the russian side that brought down a jukian jet. and today we heard a russian jet shot down a ukrainian jet. i have been speaking to military analysts here on the russian side who say that it is certainly not unfeasible that this has been going on. and the reason they said that is because for the last week or so, it seems that the kremlin -- that moscow has been becoming increasingly worried that the separatists in eastern ukraine are staring defeat in the face. that they are starting to be bested by though ukrainian army and military. and the reason why is because the ukrainian military has air superiority. so that would explain why we have started to see this spread of information about planes falling out of the sky. the analysts say if russia is that worried about what has been going on in ukraine and this seeming retreat of the pro-russian separatists, then one it could redress that balance is by supplying the separatists wit

how to open the border and let these fighters and heavy weaponry and anti aircraft miss siels and tank and all the rest of it come in or not. they could close it and make sure that didn't happen. stop these heavy weapon systems, stop russian trainers going in, mercenaries going in. all you have to be is a -- they are there. and he says that's the only way it's going to stop. but he does say also that he up until this crash, up until this downing of this plane believed that russia's interest was to create a weak eastern ukraine to continue to destabilize it, to try to continue to exert influence over him and what goes on in ukraine and that he says has to stop and we'll see whether this is a turning point, whether this will shock the russian leadership into falling into line with international procedures and respecting ukraine's sovereignty and its territorial integrity which russia signed up to way back 20 years ago, wolf. >> i was thinking you and i were in moscow together in december, 1991, when the collapse of the soviet union occurred. we saw that signing ceremony, ending 74 years