ELLSWORTH AIR FORCE BASE, S.D. -- Sgt. Mike Ghents, Pennington County Sheriff's Department school liason officer, reviews an armed threat scenario with 28th Security Forces Squadron team members, Jan. 25. Officers from the Pennington County Sheriff’s Department provided 28 SFS personnel multiple scenarios to help Airmen understand and develop tactics against them. (U.S. Air Force photo/Airman 1st Class Matthew Flynn)