undertake them, he is actually challenging the cohesion of the international system and the security of europe at the same time. >> you know, zbig, europeans are much less willing at least so far to impose sanctions. there has been some reasonably tough rhetoric, but because they are so dependent on russian natural gas, there has been a reluctance to do much more. do you believe that this will be a turning point in europe? >> my sense is that the european public opinion is aroused. this humanitarian issue is so tragic, so painful, so cruel and so unnecessary that the europeans are beginning to be moved. but each of the major european leaders has a role to play. chancellor merkel has to face the fact that her predecessor also a chancellor was one of the creator of europe's dependence on russian energy supplies. does europe want to become a satelli satellite?