It's a daily thing. There are 117 airports north of 60°. Only 10 are paved, and out of those 10, only five are well paved. The other five need to be repaved, so it's a big issue.
There are solutions out there. We have a project under way right now in which we're starting a test of alternate runway surfaces, but that's a big project. That's a long way down the road for an aluminum surface, just to share with you one large project.
Since the infrastructure is now also being affected by climate change, we have to look for other solutions as well for these runways. One of the biggest problems is, of course, the damage that it's causing to the airplanes. Whatever airplanes are being used by these mines, they're all 35 years old if they're using jets. There's only one jet, a Boeing 737-200, that can land on gravel runways, so it's a problem.