ELLSWORTH AIR FORCE BASE, S.D. -- Sgt. Mike Ghents, Pennington County Sheriff’s Department school liason officer, demonstrates the proper way to clear a stairwell to members of the 28th Security Forces Squadron, Jan. 25. The Pennington County Sheriff’s Department special response team gave 28 SFS team members precise training on various armed threat scenarios. (U.S. Air Force photo/Airman 1st Class Matthew Flynn)