Training Course Caro, a military working dog, takes part in obedience training at Davis-Monthan Air Force Base, Ariz., Sept. 23, 2019. SHARE: Download: Full Size (1.22 MB) Tags: Military Working Dogs, Air Force Credit: Air Force Airman 1st Class Kristine Legate VIRIN: 190924-F-PV484-1123C.JPG Photo Gallery