The way it looks right now, and the way it looks to those in Congress who favor leasing ANWR production, is that the North Slope has about a relatively steady 20 years to run if ANWR is phased in now. If ANWR is delayed, North Slope production will fall by that much delay, and then pick up a little when ANWR begins production. Better to have a steady production for 20 years than sporadic production for a longer period. What else might be done from other sources is a different question, but at least they would have North Slope steady for 20 years while they get something else going.