Airman 1st Class Charles Mills, 28th Maintenance Squadron nondestructive inspection technician, rinses excess penetrant liquid off a hydraulic accumulator during a nondestructive inspection process at Ellsworth Air Force Base, S.D., Aug. 9, 2013. The inspection enhances the capability to identify imperfections to aircraft parts -- if any are found, the part is sent to shops on base where they can be fixed or replaced. (U.S. Air Force photo by Airman 1st Class Anania Tekurio/Released)