Why was a cat recruited to spy for the CIA during the Cold War? What led President Roosevelt to approve the development of a bat bomb to be used against the Japanese in World War II? And how were dolphins trained to seek out enemy divers in Vietnam? Find out all this and more in this riveting episode of "War Stories with Oliver North." From antiquity to present day, you'll learn how these unsung heroes have braved enemy fire to keep our troops safe. You'll hear from a 103-year-old World War I cavalryman, and a Vietnam veteran who wouldn't be alive if it weren't for his war dog Kelly. We also take you inside behavioral training of animals that, at first glance, don't appear to be trainable. And go along for a day in the life of today's war dogs at the Department of Defense Military Working Dog School at Lackland Air Force Base. You'll see how our four-legged warriors are being trained in drug and explosive detection. Check out these other free FOX News podcasts! Perino & Stirewalt:Apple Podcasts | Google Play | TuneIn | Stitcher Find the complete list of free podcasts here.