U.S. Air Force Staff Sgt. Jaafar Hassan, a working dog handler assigned to the 379th Expeditionary Security Forces Squadron, wears a protective coat while Alf, a military working dog performs a controlled aggression tactic during a demonstration at Al Udeid Air Base, Qatar, March 12, 2018. The dogs train on how to detect explosives and narcotics as well as perform controlled aggression tactics when detaining suspects. (U.S. Air National Guard photo by Staff Sgt. Patrick Evenson)