There are two things on this.
The Field incident was a terrible tragedy, and it pointed out and revealed a risk. We took immediate action and put a very clear and very strong rule in place.
The second incident resulted in our providing additional rules that I think make absolutely clear the scope of the application of the “train securement on grade” rules. This second one is an example of an identified risk resulting in proactive action, whether through enforcement or through rules, to ensure that the risk does not turn into an accident.
The third point is that I would contest the characterization that it's unsafe, because the actual facts and the statistics and the evidence point to the fact that the rail system is getting safer over time. The number of accidents and the number of deaths are going down, while the volume, the number of trains on the tracks, is going up. As a result, there's a reduction in the rate of accidents and there's a reduction in the risk.