Fragmentation Fire Soldiers take cover while conducting live-fire training with fragmentation grenades at Joint Base Elmendorf-Richardson, Alaska, Dec. 12, 2017. The soldiers are paratroopers assigned to the 509th Parachute Infantry Regiment. Air Force photo by Senior Airman Curt Beach SHARE: Download: Full Size (2.65 MB) Credit: Senior Airman Curtis Beach VIRIN: 171212-F-IP109-0244C.JPG Photo Gallery