There's no doubt that the technology provides a better level of inspection. The submission CN has done with the panel for the review of the Railway Safety Act, which is a public document available on their website, provided a very good document on all the technology they are using. They call that their “technology toolkit”, or something like that. It is available; it describes everything you're looking for. It describes what a Sperry car is, what a track geometry car is, and every new technology—hot box detector, dragging equipment. It's a full document. It is very well done. It explains the concepts.
On December 11th, 2007. See this statement in context.