Tube Training Adja, a military working dog, passes through a training tube in the obedience yard at Al Dhafra Air Base, United Arab Emirates, Oct. 20, 2022. SHARE: Download: Full Size (3.02 MB) Tags: air force Credit: Air Force Tech. Sgt. Jeffrey Grossi VIRIN: 221020-F-UU934-1093C.JPG Photo Gallery