We are responsible for track inspections. We perform track inspections.
Maybe I went really quickly through the presentation. Track inspections are performed first of all by highly skilled, trained people who are mandated, but we also do it at a higher level. They're mandated to go over the track at least twice a week and they inspect the track on a visual basis. We also do it by running an ultrasound. We're mandated to do it four times a year, but we do it 14 to 18 times, depending on weather and on the quality of the rail. We do it by geometry test car. There are many different ways for us to do it.