Let me be clear. In looking at the NTSB report, I'm not sure there was any specific metallurgical connection made between the product and that phenomenon. It was carrying that kind of product and that kind of phenomenon can occur on pipelines. There is research into that phenomena, particularly in ways to detect it early so that you can take preventive measures.
There has also been extensive research on whether or not diluted bitumen is corrosive or damaging to pipelines, which is something we're very interested in. We had a commission from the U.K., a global survey of research, on that point. Separately, the American National Academy of Sciences did a full inquiry into it. That plus a number of other points I could go to all conclude absolutely that there is no corrosive mechanism related to dilbit that injures pipelines.