Mark Sauvao, Los Angeles Police Department dog handler and trainer, tosses a toy to his canine, Thumper, as a reward for identifying the explosive material during training at the Naval Weapons Station Fallbrook, Calif., May 23, 2018. The dog handler teams had the opportunity to practice four different National Odor Recognition tests prior to certification. ( Marine Corps photo by Lance Cpl. Betzabeth Y. Galvan)

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