Airman 1st Class Michael Ritter applies lubricant to an O-ring while Staff Sgt. Joshua Fye, both members of the 191st Maintenance Squadron, Selfridge Air National Guard Base, Michigan, observes on August 14, 2022. The 191st Maintenance Squadron supports the KC-135 Stratotanker flying mission, an air-to-air refueling aircraft. (U.S. Air National Guard photo by Master Sgt. Dan Heaton)