Protest: The Banners of Dissent

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The Pentagon is the most formidable redoubt in official Washington. Squat and solid as a feudal fortress, it hunkers in a remote reclaimed Virginia swamp that used to be called Hell's Bottom, across the Potomac River from the spires, colonnades and domes of the federal city. Through its two tiers of subbasements and five aboveground stories, windowless corridors weave like badger warrens. The bastion of America's military establishment not only houses the Secretary of Defense, the Joint Chiefs of Staff and a mint of high brass, but is also a...