Shooter Exercise Emergency responders transport a simulated victim during an active shooter exercise at Yokota Air Base, Japan, Aug. 16, 2017. The responders are assigned to the 374th Medical Group. The top priority after an active shooter event is tending to any wounded to prevent further possible loss of life. Air Force photo by Airman 1st Class Donald Hudson SHARE: Download: Full Size (0.71 MB) Credit: Airman 1st Class Donald Hudson VIRIN: 170816-F-EZ530-089C.JPG Photo Gallery