Col. Steven Hiss, 28th Bomb Wing vice commander, Lt Col. Michael Johnson, 28th Civil Engineer Squadron commander, and Col. Trent Edwards, 28th Mission Support Group commander, attends the Leadership in Energy and Environmental Design ceremony at the 28th CES headquarters on Ellsworth Air Force Base, S.D., Dec. 14, 2011. The 28th CES building is the first building on base to be awarded the silver LEED certification for its design and energy efficient features. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)