This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
outdoor architecture amphitheater GXKN The Pentagon Arlington Virginia from the south side. Photographed by PH D. Murray July . U.S. Navy Photograph now in the collections of the National Archives. Note photographed from reference card GXKN The Pentagon Arlington Virginia from the south side. Photographed by PH D. Murray