It was an OK podcast. My takeaways were that the GPS signal, by design, is so feint compared to background noise that it's relatively easy to jam. And such jammers are becoming cheap and commonplace. If you want to improve your resistance to jamming, give your device a focused antenna that only looks in the upward direction for the GPS signal and not omni-directional. Finally, other major powers, Russia and China, overcome some of these GPS signal limitations by using powerful terrestrial-based location signal generators that are much less resistance to jamming. The US would be wise to match that capability.