Airports determine what they're going to have coming in, based upon the demand at a particular airport. We don't determine demand at airports. We handle what happens when folks are flying in and out of airports. We don't say who flies in or doesn't fly in. Airports make those decisions.
That said, when traffic is lighter, as it is at night, we can do different things. If we are able and if safety permits, we can arrange our procedures to move traffic in different ways. One of the things we're looking to do at Pearson is precisely that.