Senior Airman Jazmine Thompson, 446th Maintenance Squadron non-destructive inspection technician, performs a systems effectiveness check on a Ketos ring Aug. 25, 2014, at Joint Base Lewis-McChord, Wash. NDI is responsible for performing inspections of aircraft structural components to identify damages at a microscopic level; damages such as water intrusion, delamination, and cracks of any nature or size. (U.S. Air Force photo/Airman 1st Class Jacob Jimenez)