20 Years Later: How 9/11 Has Shaped Homeland Security

Juliette Kayyem, President Obama's Assistant Secretary for Intergovernmental Affairs at the Department of Homeland Security and CNN National Security Analyst, talks about the impact of 9/11 on homeland security and what has changed in the last 20 years.

This interview originally aired as part of Wharton Business Daily's special, 9/11: 20 Years Later.

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