Handler Justin Macias, of Ft. Sill, works with his dog, Dag, to detect explosive odors during a K-9 training session hosted by the Oklahoma Highway Patrol and the U.S. Bureau of Alcohol, Tobacco and Firearms and Explosives at the Made in Oklahoma Building on the Oklahoma City Fairgrounds in Oklahoma City, Okla. on Wednesday, July 11, 2018. The training is being conducted for the National Odor Recognition Test (NORT) for explosive-detecting K-9 officers and their handlers. Law enforcement agencies and military base dog/handler teams from Oklahoma, Texas and Kansas will take part in the three day training event. Photo by Chris Landsberger, The OklahomanSource: https://newsok.com/gallery/6038707/k9-atf-training