Osan continues strong in Exercise Beverly Herd 17-3
U.S. Air Force Tech. Sgt. Ronald Cruz, 51st Aerospace Medicine Squadron NCO in charge of occupational health bio-environmental, conducts a water quality test during Exercise Beverly Herd 17-3 at the 51st Medical Group, Osan Air Base, Republic of Korea, Sept. 20, 2017. During the exercise, water quality around base was tested for contaminants and chemical agents that may have affected it from the simulated attacks on base. (U.S. Air Force photo by Staff Sgt. Franklin R. Ramos/Released)