A lingering image for any Arlington National Cemetery visitor — more than caissons bearing the soon-to-be-interred or even the white-gloved honor guard at the Tomb of the Unknown Soldier — is the perfect symmetry of alabaster headstones endlessly arrayed.

The stone sentinels give up their dead only on close inspection to visitors who leave pathways to gingerly step close and read the black lettering etched into marble.

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