J. Casey Crager

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The threat posed by underground clandestine tunnels has been a growing concern for law enforcement and national security. Cross-border tunnels have been used by smugglers with the intention of avoiding border security for trafficking people, drugs, firearms, and other illegal materials. The ability to detect these tunnels is vital to achieving effective(More)
Clandestine tunnels in the southwest border have posed a serious threat and are a growing concern for United States' national security. To address the challenges and the asymmetric threat they present, the Department of Homeland Security (DHS) Science and Technology Directorate (S&T) is presently leading the development of the Geophysical and(More)
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