ELLSWORTH AIR FORCE BASE, S.D. -- (Left) Staff Sgts. Joseph Vawter and Alston Alexander, 28th Security Forces Squadron team members, clear a room during an armed threat exercise, Jan. 25. Airmen received specific training from the Pennington County Sheriff’s Department special response team to neutralize the threat as quickly as possible. (U.S. Air Force photo/Airman 1st Class Matthew Flynn)