It very much depends on where you look in the system. If you look out on the west coast, just to take that as one example, some of the big issues are the interfaces with the various players—port authorities, marine company shippers, terminals, us, truckers—and making all that work efficiently.
We've made major improvements there. One of the largest and most important things that happened out there was the co-production agreement between CN and CP, under which we're now moving much more efficiently by sharing lines than we were ever able to do back in the old days when we were operating as separate entities out in that area. That's one example.
Another one from your area, which I know you're very familiar with, is making the border work, and that's a big issue. For us, thank heaven, the border is working reasonably well for railways. We move over 100 miles of trains a day across the border.