Dr. Dennis Montagna from the National Park Service takes one last look at the Tomb of the Unknowns Oct. 21, 2011. Montagna and other experts were invited by Arlington National Cemetery and Norfolk District, U.S. Army Corps of Engineers to inspect repairs made to cracks in the tomb. (U.S. Army photo/Kerry Solan)

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Photo by: Kerry Solan |  VIRIN: 111021-A-ET072-218.JPG