That's a tough question.
You have to balance essentially three things. You have to balance whether you hold the resource in the ground. The second thing you have to balance is what the marketplace is going to do. Will there be other sources of supply? The third thing you have to balance is the financial marketplace, because if you start putting too much regulatory in the way of the overall marketplace, the financial marketplace looks at that as a negative. It's a very delicate balance, but I think we've shown that we're pretty good at dealing with this balance.