An eyewitness shares startling video evidence of extraterrestrial activity in Fairbanks, Alaska, and a UFO hunter flies over Alaska's highest mountain in search of a secret underground alien base.For even more of The Alaska Triangle, head to discovery+. Go to discoveryplus.com/alaskatriangle to start your 7-day free trial today. Terms apply.Find episode transcripts here: https://the-alaska-triangle.simplecast.com/episodes/the-secrets-of-mount-hayes