Jack Blakeman and Preston Hansen, Complete Contracting Solutions employees, use a trencher to cut through concrete during deconstruction of row 70 on the flightline at Ellsworth Air Force Base, S.D., Aug. 5, 2013. The construction teams are renovating 22 aircraft parking spots as part of a 6-month project to refurbish the flightline. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)