The September 11 Digital Archive uses electronic media to collect, preserve, and present the history of the September 11, 2001 attacks in New York, Virginia, and Pennsylvania and the public responses to them. The Digital Archive will contribute to the on-going effort by historians and archivists to record and preserve the record of 9/11 by: collecting first-hand accounts of the 9/11 attacks and the aftermath (especially voices currently under-represented on the web), collecting and archiving emails and digital images growing out of these events, organizing and annotating the most important web-based resources on the subject, and developing materials to contextualize and teach about the events. The Digital Archive will also use these events as a way of assessing how history is being recorded and preserved in the twenty-first century and as an opportunity to develop free software tools to help historians to do a better job of collecting, preserving, and writing history in the new century.