With all due respect, I would again characterize it as making decisions about how we prioritized our work over those intervening years and making informed choices. I apologize if I use the same example, but the SMS regulations are a great example of that.
First of all, it was making sure that our rail safety management system regulations were improved in light of what we learned post Lac-Mégantic. You can't start measuring the effectiveness of that until you've actually seen railway companies implement them. That took time to do, working with railway companies to implement them.
Having had that implementation in place, we're now in a position to start measuring the effectiveness.