A worker fastens two sections of a precast concrete support arch together in the Millennium Project area of Arlington National Cemtery in Arlington County, Virginia, in the United States on March 3, 2015. The arch will support a bridge which is part of a road that will provide public access to the site once this new section of the cemetery is completed. The bridge will span a restored stream. The Millennium Project will clear 27 acres of property on the cemtery grounds, and add an additional 30,000 burial and inurnment sites.