'DNA Story': Identifying the Sept. 11 Victims

Sept. 11 changed much about the world — including the way victims of mass tragedies are identified. The former head of forensic biology for New York City talks about using DNA to identify victims of the attack, examining over 20,000 samples in an attempt to identify those who died.

Guest:

Robert C. Shaler, former director of the Forensic Biology Department, Office of the Chief Medical Examiner of New York; author of Who They Were: Inside the World Trade Center DNA Story; director, forensics program; professor, biochemisty and molecular biology, Penn State University

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