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Even under the watchful eye of the

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Army's old Guard , an attack is taking

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place on the tomb of the unknowns to

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cracks that run through the main

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sculpted stone they need to be filled

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so that water and bugs and dirt don't

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get into them . The Corps of Engineers

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and officials at the cemetery are

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working closely with the Virginia State

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Historic Preservation Office , as well

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as a multitude of federal and non

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governmental agencies to ensure the

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best possible solution in preserving

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this iconic symbol , millions of people

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come to the stone to acknowledge its

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significance and honor the sacrifices

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made . It's absolutely unique in our

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nation's heritage and it's

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irreplaceable , which is why the

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preservation effort is on in full force

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to keep the tomb intact for generations

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to come from Arlington National

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Cemetery , Patrick Bloodgood .