A U.S. Airman assigned to the 36th Civil Engineer Squadron operates a radio during a training exercise Aug. 17, 2017, at Andersen Air Force Base, Guam. Airmen that participated in Prime BEEF (Base Engineer Emergency Force) Day practiced accomplishing tasks while in Mission-Oriented Protective Posture (MOPP) gear. (U.S. Air Force photo/Airman 1st Class Gerald R. Willis)