Tech. Sgt. Tricia Carnes, 28th Medical Support Squadron TRICARE Operations Patient Administration Flight NCO in charge, explains how to enroll on TRICARE Online to Gene Billingsley, retired Senior Master Sgt., and his wife Kathy during Retiree Appreciation Day at the commissary, Sept. 19. Mr. Billingsley retired in 2000 after serving for 26 years. (U.S. Air Force photo/Senior Airman Marc I. Lane)