(TINKER AIR FORCE BASE, Okla.) Tech. Sgt. Roy Wiggen, 552nd Maintenance Group Quality Assurance Division, take a look at one of the E-3 Sentry aircraft as it has its annual isochronal inspection. ISO inspections used to be done every 180 days, but through Air Force Smart Operations for the 21st Century processes the inspections were changed to once a year - saving the Air Force time and money, and allowing theater commanders more use of the E-3. (Air Force photo by Staff Sgt. Stacy Fowler)