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) Photo essay: K-9s show off in Hawaii by Staff Sgt. Carolyn Viss 15th Wing Public Affairs 11/24/2010 - SCHOFIELD BARRACKS, Hawaii (AFNS)  -- Military working dog handlers from the Air Force, Army, Navy and Marine Corps brought their partners to the 2010 Hawaiian Islands Working Dog Competition here which ran from Nov. 15 to 19. View the slideshow.