An Airman from the 23rd Maintenance Squadron updates an explosive hazard sign during the Air Force Combat Operations Competition May 14, 2019, at Beale Air Force Base, California. During the competition, Airmen were tested on building a munitions conveyor assembly, small-bomb building, big-bomb building, trailer configuration, forward deployment capabilities, and an ammo relay. (U.S. Air Force photo by Senior Airman Tristan D. Viglianco)