Lance Cpl Matthew Lohrey, 20, a combat engineer with Engineer Company, Marine Wing Support Squadron 273, Marine Aircraft Group 31, and Indianapolis native, conducts small-arms fire exercises during a field exercise aboard Army base, Ft. Stewart, Ga., June 25. Combat Engineers build, repair and maintain buildings, roads and power supplies while employing explosives for construction and demolition projects. MWSS-273 provides all essential aviation ground support to a designated fixed-wing component of a Marine Aviation Combat Element to include internal airfield communications, weather services, expeditionary airfield services, aircraft rescue and firefighting, aircraft and ground refueling, essential engineering services, motor transport, messing, chemical defense, security and law enforcement, airbase commandant functions, and explosive ordinance disposal.