Yong Ui Song, fire alarm technician with the 51st Civil Engineer Squadron, drills a hole into the side of a metal rooftop to secure a new antenna on Osan Air Base, Republic of Korea, Nov. 29, 2018. The installation process included attaching a brace to secure the antenna, assembling the antenna properly, protecting it from lightning and function testing it to ensure operability. (U.S. Air Force photo by Staff Sgt. Benjamin Raughton)