January 2021: This recent article from The New York Times summarizes America's extreme dependence on GPS and the resulting vulnerabilities. They credit Dr. Humphreys's 2008 paper on GPS spoofing with bringing the weakness to light. When asked about the urgency of finding alternatives to GPS, Dr. Humphreys said

"If we don’t get good backups on line, then GPS is just a soft rib of ours, and we could be punched here very quickly."

The article underscores several of the Radionavigation Lab's research areas, including Russian GPS interference and maritime GPS spoofing.