U.S. Air Force Master Sgt. Stephen Hall, manpower and personnel non-commissioned officer in charge, receives an influenza vaccination from a nurse during the annual Joint Task Force Civil Support seasonal flu immunization exercise held here Oct. 17, 2013. The flu vaccine--which is mandatory for service members to receive-- is just one way that JTF-CS members can maintain their readiness to respond and remain healthy during the upcoming flu and cold season. JTF-CS anticipates, plans and prepares for chemical, biological, radiological, and nuclear Defense Support to Civil Authorities (CBRN-DSCA) response operations. (Official DOD photo by U.S. Navy Petty Officer 1st Class Brian Dietrick)