Staff Sgt. David Barbieri, crewchief with the 911th Aircraft Maintenance Squadron, tightens a bolt on a C-17 Globemaster III tire during a thru-flight inspection at the Pittsburgh International Airport Air Reserve Station, Pennsylvania, April 16, 2019. During the inspection, crewchiefs found a tire worn beyond its limits, which needed replaced. (U.S. Air Force photo by Joshua J. Seybert)