During the unveiling of the "Honoring First Responders" stamp in the Celina post office lobby, Postmaster Paul Joseph, right, honored representatives of local emergency service providers: Mercer County EMS Director Kyle Gerlach, from left, Celina Fire Chief Doug Wolters, Celina Assistant Police Chief Dan Harting, Ohio Department of Natural Resources Sgt. Kimberly Sheets, Mercer County Sheriff's Capt. Doug Timmerman and U.S. Freshwater Boaters Alliance 911 Dispatch Officer Kevin Mast.