Police Officer Shan Hanon from the Bellingham Police Department holds his partner, Brick, a German Shepherd, rewarding him for finding an explosives detection training aid at an explosives detection readiness training on the University of Washington campus in Seattle, Nov. 17, 2015. Explosives detection canine handlers use positive reinforcement like toys, treats and affection to reaffirm successful detection of explosive training aids. (U.S. Coast Guard photo by Seaman Sarah Wilson)