Lt. Col. Jason Terry, right, 52nd Airlift Squadron commander, accepted the certified Leader in Energy and Environmental Design Silver award from Heather Duggan of the Peterson-based Army Corps of Engineers in front of the award-winning building during a ceremony July 22, 2014 at the 302nd Airlift Wing campus. The building, completed in 2012 is only one of four Silver award-winning buildings on Peterson Air Force Base, Colo. (U.S. Air Force photo/Master Sgt. Daniel Butterfield)