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The way I think of it is that Russia is not going to change fundamentally. They may change tactics; they may look at their interests and figure out what actions they take, but they're not going to change fundamentally. And they're going to try to gauge what will the responses be to things that they do, and what will our things be. And here, they do wonder what is the level of our resolve? How far are we willing to go? And that is something that is very hard to gauge.