I think it's a combination of things. When we see an investigation where we have all of the data recorders and the cockpit voice recorders, then I call tell you that's a more thorough and a more scientific investigation. We are able to go further with that investigation than in one where we don't have the recorders. Too often the recorders are not on--not on the vessel, for instance--or on trains they are burned in a fire, or on aircraft sometimes they are lost.
I think if we have the data we need to demonstrate that there is a safety issue and then we're able to make a more compelling argument for change. So that's why we are calling for better recorders.