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Last updated on April 16, 2014 at 5:31 EDT

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2010-12-14 23:41:41

The University of Arizona College of Engineering is testing an invisible border monitoring system that could revolutionize the way the U.S. conducts homeland security. A unique underground surveillance system tested by UA researchers could be used to watch the entire US"Mexico border continuously. The border-monitoring system, known as Helios, consists of laser pulses transmitted through fiber-optic cables buried in the ground that respond to movements on the surface above. A...