Chief Petty Officer William Porter, maritime enforcement specialist and lead dog handler assigned to Maritime Safety and Security Team 91101 Seattle, and his partner Crema, a yellow Labrador explosives detection canine, search for and mark post-blast debris in a Raven’s Challenge training exercise in Elma, Wash., June 25, 2015. The identification of post-blast debris aids in the collection of evidence for use in post-blast investigations. (U.S. Coast Guard photo by Petty Officer 3rd Class Amanda Norcross)
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