Senior Airman Benjamin Pourian, 6th Aircraft Maintenance Squadron aerospace maintenance technician, inspects the bottom of a KC-135 Stratotanker during an aircraft wash, MacDill Air Force Base, Fla., Oct. 16, 2013. MacDill’s KC-135s are washed every 30 days to prevent salt water corrosion. (U.S. Air Force photo/Airman 1st Class Ned T. Johnston)