U.S. Air Force Lt. Col. Russell Tontz, the deputy commander for the 332nd Air Expeditionary Wing Medical Group, tests a patient’s knee and ankle joint during a routine medical visit at an undisclosed location, April 6, 2021. Tontz is a South Dakota Air National Guardsman deployed in support of Operation Inherent Resolve and when not serving in uniform he works as a doctor of occupational medicine at the Mayo Clinic in Rochester, Minn. (U.S. Air National Guard photo by Tech. Sgt. Paul Duquette)