US Air Force (USAF) Technical Sergeant (TSGT) Everett Erickson (left) and USAF TSGT Rawn Nilsen, 148th Fighter Wing, Minnesota Air National Guard (ANG), refuel a portable generator at Pike Lake Crossing. The Guardsmen are checkpoint volunteers for the annual 400-mile John Beargrease Sled Dog Marathon held along the North Shore of Lake Superior, Minnesota (MN)