Canada has had the right to have pre-clearance facilities at U.S. airports as long as the U.S. has had the right to have them in Canada, and I don't actually know why it hasn't been done. If I had to guess, I would say that it's probably due to resource constraints, because it's expensive to locate a facility. Or maybe there just wasn't a demand.
As I said in my testimony, I think it would be terrific, particularly in places such as Arizona and Florida, where you have a large population of snowbirds who go down there for the winter and come back here for the summer. That would be a tremendous convenience.