Mask time
Senior Airman Ashley Cox, 92nd Medical Operations Squadron emergency medical technician, demonstrates how to use an oxygen mask, Aug. 18, 2016, at Fairchild Air Force Base, Wash. Fairchild ambulances are capable of transporting up to four casualties at one time. (U.S. Air Force photo/Senior Airman Samuel Fogleman)

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Photo by: Senior Airman Samuel Fogleman |  VIRIN: 160818-F-XXXXX-006.JPG