I will offer one quick comment.
As I spoke earlier, the projections for U.S. energy independence are for 2020 to 2035. If that leads to saturation of the U.S. refining markets, again, that will itself close a window for Canadian product imports to the United States.
If we wait long enough and allow the U.S. boom to displace the surplus capacity at refineries in the U.S., we could miss the window on moving the oil sands bitumen to the U.S. refineries entirely.