Staff Sgt. Jessica Nace, 628th Security Forces Squadron Base Defense Operations Center controller, demonstrates how an area would be cordoned off in response to potential threats Feb. 8, 2015, at the Air Base BDOC in Joint Base Charleston, S.C. The BDOC serves as the focal point for Air Base security and defense. It plans, directs, integrates, coordinates, and controls all Air Base defense efforts. Rain or shine, day or night, weekends and holidays, defenders work to ensure the safety of Joint Base Charleston. (U.S. Air Force photo/Airman 1st Class Clayton Cupit)