my first answer to your question is the ukrainians themselves are going to make it very hard. very bloody. the sanctions? they are talking about serious sanctions as tony blinken says such as you've never seen before. we know kind of what those could be. they are very disruptive, no doubt about that. they will be painful, very painful. the idea of putting them now and taking them off if they don't i am not sure of that. the ukrainians are going to be asking for more. more sanctions now, more weapons now, and they should. they are on the front line and under attack. they should be asking for this. but my sense is that president biden is pushing hard. >> susan you were stationed in moscow with "the washington post." take us inside putin's thinking. is there any way to deter him? >> you know, jake, this is my point that i wanted to make even about right now on president biden. there are just limited tools.