U.S. Air Force military working dog Hapy waits for the signal to attack Staff Sgt. David Yaronczyk, a mock suspect, during a training exercise at Scott Air Force Base, Ill., Aug. 19, 2013. The K-9 trained regularly to maintain standards and stay proficient in necessary skills. (U.S. Air Force photo by Staff Sgt. Christopher Boitz/Released)
Staff Sgt. Christopher Boitz
Taken on 19 August 2013
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