That's a very good question, and I guess that's part of the reason I don't see people lining up to make the investment: they don't know, and we can't guarantee this. In fact, we can't even guarantee at this point when we would do this, when we would get started under the current situation. Clearly Discovery Air has run the numbers, and they believe there's a profitable opportunity for them. They're looking at a 50-tonne-lift airship, as opposed to something that would be around 20 tonnes. Our feeling is that anything over 10-tonnes-lift actually would have a market in the north, because it would be more efficient than anything that is there today.
But the bigger you get, the better it is, obviously, because you have more tonnes per dollar of expense.