The famous Pentagon, the headquarters of the United States Department of Defense. Around 26,000 people work in the building, which features 5 sides, 5 concentric rings of offices, 5 above-ground floors, and 2 underground levels.
It is an extremely iconic building, known for its massive size, importance, and especially its shape. Have you ever wondered why it has 5 sides?
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Note: "The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement."