"alcaladeThere are a few reasons for a Longhorn football practice to be moved—a tornado, hail, and fire come to mind—but a science experiment isn’t usually one of them. But it wasn’t just any science experiment that caused UT Athletics officials to relocate the Longhorns’ strength-training practice last week: it was a demo that revealed a new danger to our national security. “It was funny,” says Todd Humphreys, director of UT’s Radionavigation Lab. “We were doing this huge, unprecedented demo, and the students were most excited about the fact that they moved football practice for us.” Humphreys and a group of engineering students have dedicated their time to researching a powerful new GPS technology known as spoofing, through which one GPS signal is replaced by another.

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