U.S. Air Force Senior Master Sgt. Tim Okkerse, 724th Air Mobility Squadron superintendent, briefs U.S. Air Force Expeditionary Center leadership during a site visit at Aviano Air Base, Italy, Jan. 24, 2020. U.S. Air Force Expeditionary Center leadership visited Aviano Air Base as part of a larger visit to the geographically separated units under the 521st Air Mobility Operations Wing’s area of responsibility.