USAF-wide reorganization that resulted in the merger of AFLC and AFSC into a single major command. After AFMC was established, the command's infrastructure saw significant reductions through Base Realignment and Closure (BRAC) actions. This included the BRAC-directed closure/privatization of the San Antonio Air Logistics Center at Kelly Air Force Base, Texas and the closure of Kelly Air Force Base as an independent installation, with incorporation of its runways and remaining military flight line areas as the Kelly Field Annex to adjacent Lackland Air Force Base. The Sacramento Air Logistics Center at McClellan Air Force Base was also closed/privatized and McClellan Air Force Base totally closed. McClellan became a totally civilian airport with the exception of Coast Guard Air Station Sacramento and the Air Force Recruiting Service's 364th Recruiting Squadron. Reorganization In 2012 there was a major reorganization (5 Center Construct) and several new centers were organized. Among them, the Air Force Sustainment Center at Tinker Air Force Base now directs the Oklahoma City Air Logistics Complex at Tinker Air Force Base, the Ogden Air Logistics Complex at Hill Air Force Base, and the Warner Robins Air Logistics Complex at Robins Air Force Base. The center provides depot maintenance, supply chain management and installation support. In 2015, the command officially activated its sixth center, the Air Force Installation and Mission Support Center, which provides centralized management of installation and mission support. The center is located at Joint Base San Antonio, Texas. Mission Air Force Materiel Command conducts research, development, test and evaluation, and provides acquisition management services and logistics support. AFMC headquarters is the major unit located at Wright-Patterson Air Force Base, Ohio. There are also nine additional AFMC host bases. In addition, the command operates associate units and tenant activities on several non-AFMC bases, including the Air Force Nuclear Weapons Center at Kirtland Air Force Base, New Mexico. Component units Headquarters Headquarters Air Force Materiel Command (Wright-Patterson AFB, Ohio) Air Force Installation and Mission Support Center The Air Force Installation and Mission Support Center (AFIMSC) serves as the single intermediate-level headquarters responsible for providing installation and mission support capabilities. Its headquarters are located at Joint Base San Antonio-Lackland, Texas and it has the following subordinate units. Air Force Civil Engineer Center (Joint Base San Antonio-Lackland, Texas) Air Force Financial Management Center of Expertise (Buckley Space Force Base, Colorado) Air Force Financial Services Center (Ellsworth AFB, South Dakota) Air Force Installation