U.S. Air Force Airman 1st Class Skyler Vickery and Senior Airman Bruce Robinson from the 51st Communications Squadron guard a defensive fighting position outside of their building during Beverly Herd 17-3 at Osan Air Base, Republic of Korea, Sept. 21, 2017. The more than 250 Airmen assigned to the 51st CS handle all lines of communication at Osan, which are essential to ensuring the Mustangs are ready to “Fight Tonight.” (U.S. Air Force photo by Staff Sgt. Alex Fox Echols III)