Shortly after September 11, 2001, NPR's Lost & Found Sound brought together radio producers, archivists, new media artists, historians, and public radio stations nationwide to collect and preserve the stories and sounds of the World Trade Center and its neighborhood.

With National Public Radio, Davia Nelson and Nikki Silva (The Kitchen Sisters) set up a phone line and invited listeners to contribute their voice mails, remembrances, home recordings, and shards of sound to this documentary effort. Hundreds called with their stories and audio artifacts, both personal and historic. These recordings, along with interviews gathered by radio producers across the country, are presented in this collection of stories broadcast on NPR during the year following the attack. The archive and project continue online at www.sonicmemorial.org where one can explore the archive, contribute sounds and stories, and immerse oneself in the Sonic Browser, an interactive soundscape of stories and audio fragments.