July 18, 1970. President Nixon with Charles, Prince of Wales in the Oval Office.
<p>White House photo office. 
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Nixon Library/NARA identifier: whpo-3945-03a
As a work by the official White House photographer in his official duties in the Executive Office of the President of the United States, this image is in the public domain. <a rel="nofollow" class="external free" href="https://catalog.archives.gov/id/66394195">https://catalog.archives.gov/id/66394195</a>