LifeFlight nurse Lorry Sheasgreen and pilot Jim Gerry wait for people to tour an airplane Monday during LifeFlight’s 20th anniversary celebration at the Auburn-Lewiston Municipal Airport in Auburn. LifeFlight brings critical care staff and equipment to patients. It has transported more than 25,000 patients from every hospital and nearly all of Maine’s communities and islands. (Andree Kehn/Sun Journal)

Sandi Ouellette boards a LifeFlight airplane Monday afternoon at the Auburn-Lewiston Municipal Airport in Auburn for a tour during LifeFlight’s 20th anniversary celebration. Ouellette said she has used the services of a LifeFlight helicopter in the past. LifeFlight pilot Jim Gerry stands at left. LifeFlight was launched in 1998 by Northern Light Health and Central Maine Healthcare, with bases in Bangor, Lewiston-Auburn and Sanford. (Andree Kehn/Sun Journal)