Staff Sgt. Chad Bohr prepares to engage a gunman during an active shooter training session at Shaw Air Force Base, S.C. The 20th Security Forces Squadron schedules active shooter training twice a month to ensure their personnel are fully capable of handling a real active shooter situation. Bohr is a 20th SFS patrolman. (U.S. Air Force photo/Airman 1st Class Michael Cossaboom)