Thank you.
There are many different airlines in the world. They are at different levels of sophistication in terms of computers. I myself have had experiences in which some were okay with my telling them who I am, while others needed a paper ticket. We have different levels of that in the developed world, and still more different levels in the developing world.
What we have done with our system--and again, we're looking at a dynamic industry--is that we have not focused on the ticket sale. The ticket sale is often at three or four removes from the air carrier. It depends on who is selling it and what the conditions of sale are. We're looking at the boarding pass, that document of whatever size or shape that entitles an individual to actually get on the plane. That's the one we're focusing on.
What we hear from air carriers is that depending on their business model and how it works, they know who's getting on the plane when someone arrives at the airport and is given a boarding pass to get on the plane, so we focus ourselves around that. As you go outward in the ticket selling realm, it gets less and less clear as to who, what, where, and when, and it gets much more difficult from an operational point of view and a business point of view.
That's why we are focused on the boarding pass as a document of entitlement, and on the question of denying a boarding pass to individuals of concern.