I can't answer that. They haven't released the 2007 study, which is the most recent. The understanding we have from talking to people involved in that is that at that time the cost looked more like $4 billion to $5 billion all up, but that was frankly at a time when, as you know better than I do, things were pretty heated in the construction sector.
On May 14th, 2009. See this statement in context.