"Everybody was going along thinking that it was a day like any other day, and bang, down went the Twin Towers. Changed everything. So you can't really predict the future, but you can say, "Boy, are those glaciers ever melting." You can measure that, and you can say, "When they're all melted there won't be any Athabasca River," and you can say, "What will happen to the oil sands then?" because you need a lot of water to make that oil. "Where's that going to come from?" You can say things like that."