U.S. Air Force Airmen with the 35th Operations Support Squadron airfield systems section, inspect a localizer antennae at Misawa Air Base, Japan, Feb. 27, 2017. The antennae transmit signals at different phases for correct modulation. The flight ensures serviceability of airfield systems, which give a multitude of accurate readings to pilots, weather personnel and air traffic controllers. (U.S. Air Force photo by Airman 1st Class Sadie Colbert)