PITTSBURGH INTERNATIONAL AIRPORT AIR RESERVE STATION, Pa. -- Chief Master Sgt. Richard “Todd” Yost, chief civil engineer of the 911th Civil Engineer Squadron, retired April 9, 2017 at the Pittsburgh International Airport Air Reserve Station, Pa., after over 33 years of dedicated service. After an active duty tour stationed at McGuire Air Force Base, New Jersey, Yost, a West Virginia native, came to the 911th Airlift Wing where he spent over 29 years of his Air Force career. (U.S. Air Force photo by Senior Airman Beth Kobily)