For the past three years, the oral history project StoryCorps has recorded nearly 800 interviews from relatives and friends of people killed seven years ago today, on September 11, 2001. These recordings will eventually be preserved as part of the National September 11 Memorial Museum’s permanent collection. We hear some of these voices and speak to StoryCorps founder Dave Isay, as well as Norene Schneider, whose brother, Tommy Sullivan, was killed at the World Trade Center. [includes rush transcript]