Thank you. I'll be very brief.
I agree with what David Kramer said, but I would stress one particular point, and that is while western European governments are naturally sensitive to the economic pressures because their democracies and their publics would feel them, Russia is willing to play games with this because it is run as a top-down authoritarian state.
That being said, Europe has more options when it comes to diversifying gas supply and should it pursue that aggressively, I think it could weather a standoff with Russia on energy. Russia has many fewer options, so while, yes, it would be painful, I think Europe also comes out of that ahead.