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.
On April 3rd, 2008. See this statement in context.