Master Sgt. Celestino Madrid, 27th Special Operations Civil Engineer Squadron first sergeant, takes a phone call at Cannon Air Force Base, N.M., July 2, 2018. One of the most prominent aspects of a first sergeant’s job is being on-call for his unit at all times, staying prepared to work with their leadership, aide Airmen in need of help and disciplinary issues. (U.S. Air Force photo by Senior Airman Lane T. Plummer)