In November, 2015, Dr. Mark Psiaki from Cornell University gave a presentation on GNSS spoofing and spoofing mitigation at the International Symposium on Navigation and Timing, ENAC Toulouse, France. This talk features the collaboration on GNSS security research between Mark's research group at Cornell University and the UT Radionavigation Laboratory. It is the most comprehensive presentation on the topic of GNSS security to date, and serves as a verbal companion to Psiaki's and Humphreys's 2016 IEEE Proceedings paper "GNSS Spoofing and Detection"