Dog Dodger Air Force Staff Sgt. Sean McFadden dodges a military working dog through a smoke grenade in Surprise, Ariz., Aug. 2, 2019. Trainers use smoke grenades to help dogs ignore distractions while engaging targets. SHARE IMAGE: Download Image: Full Size (0.24 MB) Tags: Air Force Photo By: Air Force Airman 1st Class Aspen Reid VIRIN: 190802-F-YW760-0109C.JPG Photo Gallery