Senior Airman Alex M. Abrego, 89th Communication Squadron cable and antenna systems technician, climbs an operational tower at a remote location near Joint Base Andrews, Md., Feb. 19, 2019. Abrego and his fellow technicians are responsible for the uninterrupted reliability of the Air Force High Frequency Global Communications System, Navy Nuclear Command and Control, and NASA/SpaceX mission support. (U.S. Air Force photo by Senior Airman Alyssa D. Van Hook)