This primary source comes from the Record Group 330: Records of the Office of the Secretary of Defense.
National Archives Identifier:
6391909Full Citation: An aerial view of the Tomb of the Unknowns and Amphitheater at the Arlington National Cemetery; 10/2/1984; Combined Military Service Digital Photographic Files, 1982 - 2007; Record Group 330: Records of the Office of the Secretary of Defense, Record Group 330; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/aerial-view-tomb-of-the-unknowns-arlington-national-cemetery, March 29, 2024]