From the CN side, Monsieur Gaudet, we've tripled our ultrasonic rail detection since about 2003. In 2010 it was just over 200,000 miles. It's far in excess of the minimum regulatory requirement. Track geometry is a similar story. We've added a second track geometry test vehicle at considerable capital expense.
In a lot of ways, there is no better replacement than the human eyeball and the human ear, and to watch a train go by, watch a train go over the plants; we're very focused on that.
Of course, as well, we have our friends at Transport Canada who are also out there inspecting our track and seeing if they feel that we're not doing everything we should be. We take anything they say, of course, very seriously.
So there is considerable inspection of the track.