Thanks.
I'm wondering if you could talk about nuclear versus clean coal, as an example, and some of the other emerging technologies that are going to be competing with the methods of producing energy. We have a lot of plants that are going to be turning over. Between 2012 and 2020 we have a lot of plants that will need to be replaced. We need to give clear direction on what we're going to be replacing it with. Can you give me a comparison both in terms of overall costs--and I'm talking about full life, right from creating the station to decommissioning it, versus something like clean coal and how it kind of compares in terms of greenhouse gas emissions as well as cost?