Obstacle Course Senior Airman Michael Madeira, and Fix, a military working dog, train together on an obstacle course at Dyess Air Force Base, Texas, Jan. 21, 2020. The training is meant to build rapport between handlers and their dogs. SHARE: Download: Full Size (3.08 MB) Tags: Military Working Dogs, Air Force Credit: Air Force Senior Airman River Bruce VIRIN: 200121-F-GD886-1001A.JPG Photo Gallery