![Alcoa Twitterissä: "#DYK The Washington Monument has an #aluminum cap; pictured here during a flag raising ceremony in 1934. #FlagDay https://t.co/otzV9PGFI2" / Twitter Alcoa Twitterissä: "#DYK The Washington Monument has an #aluminum cap; pictured here during a flag raising ceremony in 1934. #FlagDay https://t.co/otzV9PGFI2" / Twitter](https://pbs.twimg.com/media/Ck7Snv5WgAcJCno.jpg)
Alcoa Twitterissä: "#DYK The Washington Monument has an #aluminum cap; pictured here during a flag raising ceremony in 1934. #FlagDay https://t.co/otzV9PGFI2" / Twitter
![Apex on top of the Washington Monument ~ Aluminum Pyramidian ~ When the monument was built, one of the states donated … | Washington monument, Monument, Washington Apex on top of the Washington Monument ~ Aluminum Pyramidian ~ When the monument was built, one of the states donated … | Washington monument, Monument, Washington](https://i.pinimg.com/originals/59/0b/5e/590b5e70147f9dcb43478c2d0d28a801.jpg)
Apex on top of the Washington Monument ~ Aluminum Pyramidian ~ When the monument was built, one of the states donated … | Washington monument, Monument, Washington
![Washington Monument. Cap stone of Washington Monument without lightning rods - intermediary roll film | Library of Congress Washington Monument. Cap stone of Washington Monument without lightning rods - intermediary roll film | Library of Congress](http://tile.loc.gov/storage-services/service/pnp/thc/5a48000/5a48000/5a48088r.jpg)