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File:Washington Monument Apex.jpg - Wikimedia Commons
American Council of the Blind - A model of the inscribed aluminum cap that sits at the top of the Washington Monument. | Facebook
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The view from the Washington Monument.
Washington Monument - Wikipedia
Washington Monument. Aluminum cap of Washington Monument with lightning rods IV | Library of Congress
Twitter 上的Alcoa："#DYK The Washington Monument has an #aluminum cap; pictured here during a flag raising ceremony in 1934. #FlagDay https://t.co/otzV9PGFI2" / Twitter
