I'll go back to Ms. Charlton's point about volumetrics versus type of goods.
Again, in my riding, on rail safety, my constituents are extremely concerned about certain types of oil being transported by rail, especially in their case the Bakken. Are there any particular types of oil transported in pipelines that you are particularly concerned about? I heard your arguments about volumetrics being the best metric, but is there something which there should be a special level of scrutiny around?