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U.S. Marines with Marine Wing Support Squadron 171 and Airmen with the Andersen Air Force Base Fire and Emergency Services, 36th Civil Engineer Squadron and Guam International Airport Fire Department crash fire rescue personnel pose for a photo during a controlled burn exercise at Andersen Air Force Base, Guam, July 28, 2021. Marines, Airmen, and Guam International Airport Fire Department crash fire rescue take part in annual training exercises in order to remain proficient in firefighting and rescue procedures to ensure safe airfield operations