Recycling the wreckage
A hydraulic excavator tears down a hangar door as part of on-going construction work, Dec. 9, at McConnell Air Force Base, Kan. The Department of Defense mandates that 60 percent of all construction debris be recycled. In 2014, McConnell recycled more than 78,000 tons of construction material. (U.S. Air Force photo/Airman 1st Class David Bernal Del Agua)