Master Sgt. Douglass A. Hansen Jr., 374 Security Forces Squadron flight chief, places the helmets for the memorial display at Yokota Air Base, Japan, May 23, 2019. The display was set up for the memorial service to represent SFS Airmen who lost their lives in the line of duty. (U.S. Air Force photo by Airman 1st Class Brieana E. Bolfing)