Demolishing to build efficiency
An excavator demolishes Building 804 Oct. 19, 2012, McConnell Air Force Base, Kan. The removal of Building 804, along with other structures on base, is part of the Air Force’s goal to become more efficient and reduce energy costs by 20 perscent by the year 2020. (U.S. Air Force photo/Airman 1st Class Maurice A. Hodges)