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Senior Airman Holly Durkin, a Cyber Surety Technician for the 129th Communications Flight, Moffett Federal Airfield, Calif., replaces an uninteruptable power supply (UPS) from a network server, August 4, 2010. The UPS serves as back-up power supply for network servers in case of main power loss. (Air National Guard photo by Tech. Sgt. Ray Aquino)
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