September 11, 2001, will be remembered as one of the most shocking days in American history. Armed terrorists hijacked four passenger jets and used them as weapons against the United States. The attacks destroyed the World Trade Center, damaged the Pentagon, and killed more than three thousand people.
Soon after September 11, the National Museum of American History began collecting objects to document the attacks and their aftermath.
The Smithsonian National Museum of American History presented the exhibit "September 11: Bearing Witness to History" one year after the attacks of September 11, 2001. The immediacy of the events and exhibit prompted more than 10,000 visitors to share their story on cards in the exhibit hall, which are availble from the September 11 Digital Archive website. Visitors to the online exhibition may share their stories through a partnership with the September 11 Digital Archive, and thousands have already done so.