Inside the lab working to identify the remains of 9/11 victims

Kevin McKenna (left) and Kathleen Wang look over notes at the Charles S. Hirsch Center for Forensic Sciences Office of Chief Medical Examiner in New York City. They are part of a team working to identify the remains of people who died on Sept. 11, 2001.

1,100 people killed on 9/11 in New York City have not had any of their remains identified by authorities. The medical examiner's office is using new technology to identify more people.

(Image credit: José A. Alvarado Jr. for NPR)