In this undated photo provided by the National September 11 Memorial & Museum, a damaged photographer's proof sheet, with photos of William DeCosta, the aviation Director of the Port Authority of New York and New Jersey is shown. The document was found by a recovery worker a few blocks away from ground zero and he eventually traced it to DeCosta, who continued to work for the Port Authority until his death about 2 years ago. Besides ending nearly 3,000 lives, destroying planes and reducing buildings to tons of rubble and ash, the Sept. 11, 2001, attacks destroyed tens of thousands of records, irreplaceable historical documents and art. (AP Photo/National September 11 Memorial & Museum)

Associated Press
In this undated photo provided by the National September 11 Memorial & Museum, a damaged photographer's proof sheet, with photos of William DeCosta, the aviation Director of the Port Authority of New York and New Jersey is shown. The document was found by a recovery worker a few blocks away from ground zero and he eventually traced it to DeCosta, who continued to work for the Port Authority until his death about 2 years ago. Besides ending nearly 3,000 lives, destroying planes and reducing buildings to tons of rubble and ash, the Sept. 11, 2001, attacks destroyed tens of thousands of records, irreplaceable historical documents and art.  (AP Photo/National September 11 Memorial & Museum)
In this undated photo provided by the National September 11 Memorial & Museum, a damaged photographer's proof sheet, with photos of William DeCosta, the aviation Director of the Port Authority of New York and New Jersey is shown. The document was found by a recovery worker a few blocks away from ground zero and he eventually traced it to DeCosta, who continued to work for the Port Authority until his death about 2 years ago. Besides ending nearly 3,000 lives, destroying planes and reducing buildings to tons of rubble and ash, the Sept. 11, 2001, attacks destroyed tens of thousands of records, irreplaceable historical documents and art. (AP Photo/National September 11 Memorial & Museum)
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