Airman 1st Class Corey Franklin, 6th Logistics Readiness Squadron fuels laboratory technician, removes a filter pad after a fuel sample test at MacDill Air Force Base, Florida, Sept. 18, 2014. Franklin uses various tests to check for five major categories: high solid levels, excessive water, proper color, fuel system icing, and corrosion. (U.S. Air Force photo/Airman 1st Class Ned T. Johnston)