Over the last decade, we have undertaken one of the most extensive fleet renewal efforts in the history of our industry. In addition to improving the flight experience for our customers, these new aircraft replace older, less fuel-efficient aircraft with newer, more fuel-efficient and quieter ones. Our fleet renewal efforts have contributed significantly to improving fuel efficiency, which is now 13.9 gallons per 1,000 available seat miles (ASMs) for our mainline fleet, down from 15.4 gallons per 1,000 ASMs in 2014.