The simple answer is no, we haven't analyzed that at all, but currently our focus is more on what the implication is to Canada if the U.S. becomes self-sufficient in oil. In other words, how much of our oil sands and our conventional oil would get backed out of that market?
With that process of becoming partially or fully sustainable in oil production, or whatever they get to, there's an implication as to the differential to Canada. In other words, if we don't build new pipes, and our pipes are jammed full and there's no more capacity left, the differential will stay open. The move towards upgrading to refined petroleum products—the door opens, and that might be the only way to get our resources out of North America: basically sending diesel and gas to the coast and onto ships to foreign markets.
Let me just add that we are looking at the possibility, along with others, of converting one of TransCanada's mainline pipes over to oil so that we can connect western crude to our eastern refineries.