First of all, we don't only investigate accidents. We also investigate incidents where there was a risk of an accident, which if left unattended could...so we do investigate incidents, even if there was no injury or damage per se.
In terms of the railway industry, they've developed a lot of surveillance technology from the point of view of the conditions of the rail and the condition of the train. That has caused a significant reduction in those types of accidents. What we're missing is on the human-factor side.
Why is it that a crew wouldn't see or respond to a stop signal that's coming up? Why did they not call the signals to each other? Why were they going too fast through a particular area where they were supposed to be operating more slowly? Those are the things that we need to see in our investigations, to point out deficiencies. We believe the railway companies, with the benefit of that information, subject to the safeguards that we mentioned, will be able to take action before an accident occurs to reduce the risk of an accident.