Working dog competition
Staff Sgt. Nicholas Vollweiler and his two-year-old dog, Laci, navigate an obedience course Nov. 19, 2010, at Schofield Barracks, Hawaii. Thirty-nine handlers from the Army, Navy, Marine Corps, and Air Force brought their K-9s to the competition which paced the teams through a series of events. (U.S. Air Force photo/Staff Sgt. Carolyn Viss)