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.

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buildings to tons of rubble and ash, the Sept. 11, 2001, attacks destroyed tens of thousands of records, irreplaceable historical documents and art.

Former President George W. Bush says his apparent lack of reaction to the first news of the September 11 2001 attacks was a conscious decision to project an aura of calm in a crisis.

In a rare interview with the National Geographic Channel, Bush reflects on what was going through his mind at the most dramatic moment of his presidency when he was informed that a second passenger jet had hit New York's World Trade Center.

The head of a fund for people injured in the Sept. 11 attacks on the World Trade Center explained Thursday how they could be eligible for compensation but got an earful from those who said the limitations are too restrictive and seem engineered by detached lawmakers in Washington.

Sheila Birnbaum, the New York attorney charged with administering the fund, addressed about 50 first responders and others at a town hall meeting in City Hall two days after a federal review found insufficient evidence linking cancer to Sept. 11 to warrant adding cancer to the list of conditions covered.

Cancer-stricken emergency workers who responded to the 9/11 attacks on the World Trade Center and cancer victims who resided in the area do not qualify for federal aid, according to a review by the National Institute for Occupational Safety and Health.

NIOSH concluded that "insufficient evidence exists at this time to propose a rule to add cancer, or a certain type of cancer," to the list of diseases that qualify for aid under the James Zadroga 9/11 Health and Compensation Act.