Yes. It works in two different ways, but in Canada, where we do what we call a certified car inspection, it's based on a plan that we've submitted to Transport Canada, which they approve. We say this train will get inspected by certified car inspectors at such and such a location. Then we have a system of wayside inspection equipment spaced across our network to measure wheel gauges; out of ground wheels; hot boxes; hot wheels and cold wheels, which are an indication of brake problems. That's something we've been investing in very heavily over the past few years.
