A U.S. Air Force Airman of the 379th Expeditionary Civil Engineer Squadron (ECES) emergency management office, hydrates during a joint decontamination exercise Feb. 22, 2019, at Al Udeid Air Base, Qatar. U.S. Air Force and Army participants from the 379th Expeditionary Civil Engineer Squadron and the 1st Battalion, 43rd Air Defense Artillery regiment, 11th ADA Brigade, shared Chemical, Biological, Radiological, Nuclear, and high yield explosives (CBRNE) best practices, and tested their response proficiency during the training. The event was the conclusion of a four phase training curriculum. (U.S. Air Force photo by Tech. Sgt. Christopher Hubenthal)