Sample of the treated fabric from the Spirit of St. Retrieved: June 9, 2015. Rohlsen Arpt St Croix, VI United States St George Airport St George Island, AK United States Spirit Of St Louis Arpt St Louis, MO United States East St Louis St Louis, MO United States Lambert St Louis Intl St Louis, MO United States St Mary's Airport St Mary's, AK United States St Michael Airport St Michael, AK United States St Paul Island Airport St Paul Island, AK United States Downtown St Paul Arpt St Paul, MN United States Whitted Airport St Petersburg, FL United States St Petersburg Clearwater Arpt St Petersburg, FL United States Mckinnon Arpt St Simons Island, GA United States Cyril E King Arpt St Thomas, VI United States Univ Park Arpt State College, PA United States Statesville Municipal Arpt Statesville, NC United States Shenahoah Valley Regional Staunton, VA United States Steamboat Arpt Steamboat Springs, CO United States Stebbins Airport Stebbins, AK United States Whiteside Cty Municipal Sterling, IL United States Stevens Point Municipal Stevens Point, WI United States Searcy Fld Stillwater, OK United States Stockton Metro Arpt Stockton, CA United States Stony River 2 Airport Stony River, AK United States Witham Field Stuart, FL United States Door Country Arpt Sturgeon Bay, WI United States Kirsch Municipal Sturgis, MI United States Hull Field Arpt Sugar Land, TX United States Sumter Municipal Arpt Sumter, SC United States Friedman Memorial Sun Valley, ID United States Richard I Bong Arpt Superior, WI United States Hancock Intl Syracuse, NY United States Tacoma Industrial Arpt Tacoma, WA United States Takotna Airport Takotna, AK United States Tallahassee Municipal Tallahassee, FL United States Peter O Knight Arpt Tampa, FL United States Tampa Intl Tampa, FL United States Ralph M.