Staff Sgt. Ellie Dierkhising, 28th Medical Operations Squadron flight medicine independent medical technician, and Senior Airman Sylvester Snell, 28th MDOS public health technician, inspect a walk-in food freezer during a health inspection at the Exchange food court on Ellsworth Air Force Base, S.D., April 18, 2013. The freezer must maintain approximately zero degrees Fahrenheit to eliminate all possible contaminants in stored food. (U.S. Air Force photo by Airman 1st Class Kate Thornton-Maurer/Released)