Military Police Working dog Asta attacks Master-at-Arms 2nd Class William Bryan during a controlled aggression demonstration on Ford Island at Joint Base Pearl Harbor-Hickam. MWDs are used to apprehend suspects and to detect explosives and narcotics while searching buildings, ships and submarines. (U.S. Navy photo by Mass Communication Specialist 3rd Class Diana Quinlan/Released)
Petty Officer 3rd Class Diana Quinlan
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