ELLSWORTH AIR FORCE BASE, S.D. - Col. Renita Alexander (right), former 28th Mission Support Group commander, receives a shadow box from Lt. Col. Dean Hullings (center), 28th Mission Support Group deputy commander, and Chief Master Sgt. Rick Ives (left), 28th Mission Support Group chief enlisted manager, reflecting her 26 years of service to the U.S. Air Force. Colonel Alexander started her career as the officer-in-charge of material control at the 31st Fighter Wing, Homestead AFB, Fla., and ended as the 28th Mission Support Group commander here. (U.S. Air Force photo/Senior Airman Kasey Zickmund)