Thanks go to our advisory group, Paul Hohn, Shawna Legarza, Bequi Livingston, and Michelle Reugebrink; to reviewers, Steve Karkanen and Joe Domitrovich; to our outstanding publications staff, Bert Lindler, Ted Cote, and Jerry Wolf; and to Carlie Magill, archives manager for the USDA Forest Service, Northern Region, for her help in acquiring historical photographs. Special thanks to Bob and Jean Anderson of Stretching, Inc., for permission to use excerpts from their selected stretching publications. The cover photograph is used with permission from the Zephyr Fire Crew and Wildfire.com.