concerning at all? >> look, putin has never been particularly concerned about civilian casualties or the loss of human life, the russian operations in syria were brutal. the russian operations in chechnya probably killed a quarter of a million people and leveled the entire city of grozny virtually to the ground. so the issue is not putin's brutality. what worries me even more sad to say is his unpredictability. he seems to now be more emotional, less calculating, less rational than he has ever been before, and that makes it very hard to figure out how do you stop him, how do you negotiate with him? what are the levers to pull? we're dealing with a very volatile situation. one man, who controls the largest nuclear arsenal in the world, making decisions of what