Cannabis canines

From right: Grizzly looks up at Alameda County sheriff's deputy Jeff Edwards during narcotics K-9 training at the Oakland International Airport on Thursday, May 11, 2017, in Oakland, Calif. The dogs and the handlers are training to spot many types of drugs, excluding marijuana. Amid legalization of marijuana, California's current pot-sniffing K-9s face retirement. SOURCE: Santiago Mejia

From right: Grizzly looks up at Alameda County sheriff’s deputy Jeff Edwards during narcotics K-9 training at the Oakland International Airport on Thursday, May 11, 2017, in Oakland, Calif. The dogs and the handlers are training to spot many types of drugs, excluding marijuana. Amid legalization of marijuana, California’s current pot-sniffing K-9s face retirement. SOURCE: Santiago Mejia