Tunnel Vision Military working dog Rex, an explosive detection dog assigned to the 75th Security Forces Squadron, navigates an obstacle during obedience training with Air Force Tech. Sgt. Hailey Pethtel at Hill Air Force Base, Utah, May 8, 2025. Rex is the newest K-9 to join the squadron and is undergoing a field transition evaluation, which is a rigorous assessment designed to ensure he is fully mission-ready before validation and certification. SHARE: Download: Full Size (1.06 MB) Tags: dogs, training, .Air Force Credit: Cynthia Griggs, Air Force VIRIN: 250508-F-EF974-1103M.JPG Photo Gallery