No place in the pentagon is more than a seven-minute walk to an other spot

The Pentagon is the headquarters of the United States Department of Defense, located in Washington, D.C. It's one of the largest office buildings in the world, with an outside perimeter almost a mile long and containing 17.5 miles of corridors which are walked by some 26,000 employees and personnel. But it's also one of the most efficiently-designed -- any two points within the building are no more than a seven-minute walk apart.

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