Chief Petty Officer William Porter, maritime enforcement specialist and lead dog handler assigned to Maritime Safety and Security Team 91101 in Seattle, and his partner Crema, a yellow Labrador explosives detection canine, search for buried casings in a Raven’s Challenge training exercise in Elma, Wash., June 25, 2015. This training area contained three different sized sets of casings buried across a field with empty dig spots acting as decoys. (U.S. Coast Guard photo by Petty Officer 3rd Class Amanda Norcross)
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