sanctions. >> so the second point, i want you to listen to what joe biden said about sanctions. here he was thursday. >> increasing the pain and why i asked for this meeting today with nato is to be after a month we will sustain what we're doing for the remainder of this entire year. that's what will stop him. >> i want you to talk me through this emphasis on maintenance of sanctions. you heard him saying not next month or the month after. when we talk about the fact that this is going to be a long, sustained effort, how long? what are we talking about before it reaches a breaking point? >> well, it's hard to say how long the sanctions will stay for, because it's hard to know when putin's behavior will stop.