U.S. Air Force Senior Airman Ronald Anazco from the 108th Maintenance Squadron nondestructive inspection (NDI) shop looks at cracks seen on a KC-135 Stratotanker part during a training session at Joint Base McGuire-Dix-Lakehurst, N.J., April 22, 2017. NDI airmen have a variety of technological techniques at their disposal, from fluorescent penetrant to magnetic particle and eddy current testing. (U.S. Air National Guard photo by Master Sgt. Matt Hecht/Released)