It's a good question. If we are talking about people, then we are talking about the borders or flying across, and to a much lesser extent about ships.
A lot of people fly to the United States on a daily basis, back and forth, so pre-clearance, which is something that was started under the previous government in discussions with the United States, is an ongoing issue. Pre-clearance, as you know, allows airports.... There are eight airports in Canada that have pre-clearance, but there are a couple more that have asked for it. Billy Bishop, and in Quebec City, Jean Lesage, have asked for pre-clearance. This opens up all sorts of possibilities for them and I think ultimately makes for a smoother flow of passenger traffic. Those are things we are discussing with the United States.
I was very pleasantly surprised at the degree of harmonization that we have with the Department of Transportation in the United States with respect to the transportation of goods. I think that in some cases we still have some work to do to harmonize regulations because if a truck or a train crosses and comes into a different set of rules on each side, then that presents difficulties. We want things to be as smooth and fluid as possible, but I think we have achieved some pretty remarkable things over the.... I'll give the previous government credit as well. It is in our mutual interest to have that. There are still some things that we can improve with respect to that.
We are always concerned about the border becoming thicker. It would be nice if we could keep the cargo moving. As you know, over $2 billion cross between Canada and the United States on a daily basis, mostly by train or truck. As they said on TV last night, Canada is the largest destination for 35 states in the United States. We are their main importer. The more efficient we can make that, the better. That is why I met not only with the U.S. Secretary of Transportation, but also with Homeland Security, because they are responsible for the border services and for issues like pre-clearance. We are trying to make it as smooth and fluid as possible whilst addressing Americans' number one concern, security. I think we are making progress.