YOKOTA AIR BASE, Japan -- Senior Airman Jonathan Keller prepares to operate a Lorad portable X-ray equipment during inspection of a C-130 Hercules aircraft inside a hangar here. The nondestructive inspection technician, assigned to the 374th Maintenance Squadron here, is checking the door frame of the aircraft for structural cracks. NDI Airmen use X-ray and advanced technology to examine the uniformity, quality and serviceability of components of assigned and in-transit aircraft. (U.S. Air Force photo by Master Sgt. Val Gempis)