Keeping Osan secure
Airman 1st Class Taali Ruffin, 51st Security Forces Squadron tactical automated security system administrator, inspects the rechargeable battery module of a passive infrared sensor during a regular maintenance inspection on Osan Air Base, Republic of Korea, June 27, 2013. Airmen working electronic security monitor sensor system malfunctions and upgrades, and are in charge of alarms and more than 180 cameras, ensuring each system is 100 percent intruder detection capable. (U.S. Air Force photo/Senior Airman Kristina Overton)