Airmen inspect for hidden damage
U.S. Air Force Senior Airman Luis Padilla, 20th Equipment Maintenance Squadron (EMS) nondestructive inspection (NDI) journeyman, left, and Airman 1st Class Lorenzh Scott, 20th EMS NDI apprentice, apply penetrant chemical to equipment welds at Shaw Air Force Base, S.C., Oct. 18, 2017. The Airmen then used a developer chemical to make damage in the metal visible during scheduled inspections. (U.S. Air Force photo by Airman 1st Class Kathryn R.C. Reaves)