Senior Airman Eric Salazar checks readings on a handheld monitor while Airman 1st Class Taali Ruffin blocks the alignment of the transmitter to the receiver of a passive infrared sensor during a regular maintenance inspection on Osan Air Base, Republic of Korea, June 27, 2013. Both Salazar and Ruffin are tactical automated security system administrators with the 51st Security Forces Squadron. (U.S. Air Force photo/Senior Airman Kristina Overton)
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