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The Pentagon - Wikipedia
10 Things You Probably Didn't Know About the Pentagon
Pentagon Directory - Phone Numbers & Directions
Pentagon Tours - U.S. Department of Defense
Pentagon | History & Features | Britannica
Pentagon ‑ Location, Building Timeline, 9/11 - HISTORY
Can I Tour the Pentagon? - Washington DC
Pentagon History: 7 Big Things to Know - U.S. Department of Defense
Pentagon, The - Encyclopedia Virginia
Historical Office > DOD History > Pentagon > History