Lance Cpl. Dustin Campbell, provost marshal’s office military dog handler, holds back Rex, a military working dog, from Chad Conley, Cocopah Police Department dog handler, during an aggressor demonstration at a training warehouse off Avenue B in Yuma, Ariz., March 11, 2010. The police department has been training its dogs and strengthening their capabilities by working with the Marines for the past five months. “We’re glad to have these resources to tap into,” said Chad Conley, CPD dog handler. “The Marine base has been an irreplaceable asset to our program.” Normally, the CPD take their dogs to the station to train. Using the warehouse was meant to adapt the dogs to strange settings and keep training from becoming stagnant. During training, the dogs sniffed out and located objects carrying the scent of substances such as marijuana and heroin, and also practiced subduing aggressors, who wore thick bite-resistant suits.