Senior Airman Patrick Duffie, 36th Operations Support Squadron airfield systems technician, flips breaker switches to ensure power is being properly dispersed to the wind bird, a wind sensor, June 2, 2015, at Andersen Air Force Base, Guam. The technicians guarantee safe landings everyday by performing routine checks on essential equipment such as the glideslope, localizer, and TACAN or tactical air navigation. (U.S. Air Force photo by Senior Airman Amanda Morris/Released)