I imagine it's extremely expensive to operate oil and gas wells in the Beaufort or anywhere in the Arctic. I'm from northwestern Ontario. I know that operating mines in northwestern Ontario is much more expensive than operating a mine in, say, northern Minnesota, which isn't that far away but the infrastructure to bring in equipment, people and all the other things you need to operate these very intensive pieces of infrastructure is there. The price point for either minerals or oil has to be at a certain level before it's economically viable.
I'll put it to you that it wasn't economically viable up until 2007, and that's why Shell pulled out.