This image was acquired from
wikimedia. 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:
United States Naval Research Facility. Picture of the United States Naval Research Facility from the Potomac River en Quadell CommonsHelper AJN en AJN original upload log page en DSCN AJN bytes no of the United States Naval Research Laboratory from the Potomac River AJN bytes no of the United States Naval Research