Obstacle Course Diego, a military working dog, jumps over an obstacle on a training course at Osan Air Base, South Korea, March 12, 2019. SHARE IMAGE: Download Image: Small (266.24 KB)| Medium (788.48 KB)| Full Size (1.5 MB) Tags: Air Force, Indo-Pacific Photo By: Staff Sgt. Ramon Adelan VIRIN: 190312-F-HK496-1032A.JPG Photo Gallery