Mystery surrounds loss of records, art on 9/11

Mystery surrounds loss of records, art on 9/11: "NEW YORK (AP) -- Letters written by Helen Keller. Forty-thousand photographic negatives of John F. Kennedy taken by the president's personal cameraman. Sculptures by Alexander Calder and Auguste Rodin. The 1921 agreement that created the agency that built the World Trade Center...."

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