Norman Weiss from Columbia University listens to Kathryn A. Condon, Arlington National Cemetery’s executive director, discuss repairs made to the Tomb of the Unknowns in early September. Experts gathered at the tomb that morning, Oct. 21, 2011, to inspect the repairs. (U.S. Army photo/Kerry Solan)

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Photo by: Kerry Solan |  VIRIN: 111021-A-ET072-144.JPG