materiel. Support begins with joint planning with the services for parts for a new weapons system, extends through production, and concludes with the disposal of material which is obsolete, worn out, or no longer needed.  The  agency  provides  logistics  support, contract  administration  services,  and  technical services to all branches of the military and to a number of federal agencies. Within the agency’s Defense Logistics Support Command (DLSC), professional logisticians buy and manage a vast number and variety of items used by all of the military services and some civilian agencies. The military services determine their requirements for supplies and materiel and establish their priorities. Agency supply centers consolidate the services’  requirements and procure the supplies in sufficient quantities to meet the services’  projected needs, critical to maintaining the readiness of our forces.  The  agency  manages  supplies  in  eight commodity areas: fuel, food, clothing, construction material,  electronic  supplies,  general  supplies, industrial supplies, and medical supplies. The DLSC also manages the distribution function for the agency through the Defense Distribution Center. Distribution is defined as all actions involving the receipt of new procurements, redistribution, and field returns; storage of materiel, including care of materiel and supplies in storage; the issuance of materiel; consolidation and containerization of materiel; preservation, packaging, packing, and marking; physical inventory; quality control; traffic management; other transportation services,   unit   materiel   fielding,   and   set assembly/disassembly; and transshipment and minor repair. DEFENSE  SECURITY  SERVICE.—The Defense  Security  Service,  formerly  the  Defense Investigative Service, was established by the SECDEF in the Defense Reform Initiative dated November 1997. The service is chartered by DoD Directive 5105.42 and is under the authority, direction, and control of the Assistant SECDEF for Command, Control,  Communications,  and  Intelligence.  The service provides a full range of security support services  for  the  DoD,  other  federal  government agencies, defense contractors, and other authorized customers. It is responsible for all personnel security investigations for department components and, when authorized, investigations for other U.S. government activities. These include investigation of allegations of subversive  affiliations,  adverse  suitability information, or any other situation that requires resolution  to  complete  the  personnel  security investigation. The service also is responsible for industrial security management; automated systems security; polygraph research, education, training, and examinations; and security research, education, and training. DEFENSE THREAT REDUCTION AGENCY.—The Defense Threat Reduction Agency (DTRA) was established as a separate agency of the DoD on October 1, 1998, by DoD Directive 5105.62. DTRA was formed by the consolidation of selected elements of the Office of the SECDEF, the Defense Special Weapons Agency, the On-Site Inspection Agency,  and  the  Defense  Technology  Security Administration. DTRA is a combat support agency of the DoD and is under the authority, direction, and control of the Under SECDEF for Acquisition and Technology. DTRA is responsible for threat reduction to the United States and its allies from nuclear, biological,  chemical  (NBC),  and  other  special weapons, as well as advanced conventional weapons. Through  the  execution  of  technology  security activities, cooperative threat reduction programs, arms control treaty monitoring and on-site inspection, force protection, NBC defense, and counterproliferation, DTRA  supports  the  U.S.  nuclear  deterrent  and provides  technical  support  on  weapons  of  mass destruction matters to DoD components. NATIONAL  IMAGERY  AND  MAPPING AGENCY.—The National Imagery and Mapping Agency (NIMA) was established on October 1, 1996, as a member of the intelligence community and a DoD combat support agency. It is chartered under DoD Directive 5105.60, pursuant to the National Imagery and Mapping Agency Act of 1996 (10 U.S.C. 441 et seq.). NIMA operates under the authority, direction, and control of the SECDEF, with the advice of the Chairman  of  the  Joint  Chiefs  of  Staff,  and  in accordance with the policies and priorities established by the Director of Central Intelligence. The Assistant SECDEF for Command, Control, Communications, and Intelligence exercises overall supervision over NIMA. The agency is responsible for providing timely, relevant, and accurate imagery, imagery intelligence, and geospatial information in support of the national security objectives of the United States. With a vision of  guaranteeing  the  information  edge,  NIMA  is committed to delivering the imagery and geospatial information that gives national policymakers and military users information superiority in a rapidly changing  global  environment.  NIMA  supports national policy objectives by committing substantial imagery analysis resources to national priorities, especially as they relate to diplomatic and regional 5-8