Gina Ligon, director of the National Counterterrorism Innovation, Technology and Education Center, a Department of Homeland Security Center of Excellence based at the University of Nebraska, joins Newsline with Brigitte Quinn to talk about how terror threats have evolved since 9/11 and the country's approach to security.

PHOTO: Members of the Port Authority Police and the NYPD stand guard on a roof top over looking the ceremonies for the lives lost at 9/11 on Sept. 11, 2023. (David Dee Delgado/Getty Images)

<p>Gina Ligon, director of the National Counterterrorism Innovation, Technology and Education Center, a Department of Homeland Security Center of Excellence based at the University of Nebraska, joins Newsline with Brigitte Quinn to talk about how terror threats have evolved since 9/11 and the country's approach to security.</p>
<p>PHOTO: Members of the Port Authority Police and the NYPD stand guard on a roof top over looking the ceremonies for the lives lost at 9/11 on Sept. 11, 2023. (David Dee Delgado/Getty Images)</p>

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