I guess the challenge is to make sure the system that's overlaid the other system doesn't interfere with it in terms of reliability.
I'd just like to switch to Ms. Kenny for a minute. A couple of weeks ago, I understand about 16 environmental groups wrote a letter to one of the railways—I think it was CP. Basically they were trying to convince them that they should stop shipping oil because they said that railcars weren't as safe as pipelines. I think we have a pretty good safety record in terms of rail, but I just wonder if you are aware of that and if you have any comments to make about the safety record you have. You made a couple of comments earlier. Are you aware of that letter that went out?