U.S. Air Force Staff Sergeant Amanda Urie, 88th Security Force Squadron Working Dog Handler, directs "Ruth", a military working dog, to seek drug contraband or explosive materiel on a vehicle at Wright-Patterson Air Force Base Sept. 14, 2016. Military working dogs provide service in drug and explosives detection, sniffing out a broad range of substances despite efforts at concealment. (U.S. Air Force photo/Al Bright)