In the past, we've made many changes in terminal manoeuvring areas in large cities. These generally take place a fair distance from the airport where the aircraft are at higher altitudes. In the past, we have made these changes and there have never been complaints. So, quite frankly, it didn't dawn on us that there would be any noise impacts in this case. We were, quite frankly, taken by surprise afterwards to find there were people with complaints.
We listened to the people and made the changes we could make, consistent with our other obligation to have safe approaches and departures in the Vancouver area, which is a quite complex area. It is probably the busiest terminal area in Canada, with all of the other airports there. We also instituted and paid for the noise monitoring.
Quite frankly, the only independent and objective standard I know of to gauge airport noise is to in fact retain engineering firms to do the noise monitoring and see exactly what happens over time. So that's what we've done. I think the results of that monitoring now show that certainly on the basis of those objective standards, aircraft noise is not really intrusive in those communities. I think that's the best we can do in trying to mitigate it.