Staff Sgt. William Anderson, a crew chief with the 191st Maintenance Squadron inserts a heating hose into a KC-135 Stratotanker in pre-flight operations at Selfridge Air National Guard Base, Mich., Nov. 4, 2019. The KC-135 can be used for air to to air refueling or passenger and cargo transportation. (U.S. Air National Guard photo by Tech. Sgt. Dan Heaton)