Airman 1st Class Elias Van Zweden, a 28th Command Post controller, manages a checklist after receiving a call about the giant voice system on Dec. 5, 2018, at Ellsworth Air Force Base, S.D. The command post is the central hub of information distribution to the base and is manned every day, regardless of weather or holidays. (U.S. Air Force photo by Senior Airman James L. Miller)