We charge terminal fees at airports where we have staffed facilities, either an air control tower or a flight service station. However, the charging formula is national. It's based on aircraft weight; it isn't based on the airport's specific costs. We have a flat national fee that applies, so that it doesn't matter.
If you take an airport such as Toronto, which has 450,000 movements a year, I think the terminal charge today there for a B-737 is roughly $1,500. That $1,500 is what that jet will pay no matter where it lands in Canada. Whether it's in Toronto, Montreal, Thunder Bay, Yellowknife, Kelowna, Fort McMurray—you name it—that's what it will pay. If we changed to site-specific charging—and some countries do this—we would end up with that airplane probably paying $200 in Toronto and paying $7,000 or $8,000 or $9,000 to land in Yellowknife or Fort McMurray.