Airman 1st Class Charles Mills and Shane Gorman, 28th Maintenance Squadron nondestructive inspection technicians, remove a hydraulic accumulator out of penetrant liquid during inspection at Ellsworth Air Force Base, S.D., Aug. 9, 2013. It is vital to let the penetrant liquid completely absorb into the piece for 30 minutes to 4 hours, allowing for proper visual inspection to take place afterwards. (U.S. Air Force photo by Airman 1st Class Anania Tekurio/Released))