Forward Leap Air Force Airman 1st Class John Fountain holds on to Deny, a military working dog, as he jumps over an obstacle on a training course at Minot Air Force Base, N.D., April 24, 2019. SHARE: Download: Full Size (3.67 MB) Tags: Military Working Dog, Air Force Credit: Air Force Airman Jesse Jenny VIRIN: 190424-F-IP597-1002C.JPG Photo Gallery