Confidence Course U.S. Air Force Staff Sgt. Liberty Angel guides Rico, a military working dog with the 31st Security Forces Squadron, over a hurdle while accomplishing an obedience training obstacle course on Aviano Air Base, Italy, March 3, 2006. The course is designed to keep the working dogs confident in performing their duties. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 875182-Y-DME02-174.jpg Photo Gallery