Washington Monument. Men examining aluminum cap of Washington Monument - PICRYL - Public Domain Media Search Engine Public Domain Search
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Materials Witness: The Point of a Monument: A History of the Aluminum Cap of the Washington Monument
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DVIDS - Images - Lantern Slide 20: Capstone and aluminum tip of the Washington Monument. [Image 4 of 20]
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Washington Monument. Aluminum cap of Washington Monument with lightning rods IV | Library of Congress
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