During the Cold War, as Project Blue Book investigated potential UFO threats, a shocking 1955 sighting in Kentucky pushed the U.S. Air Force’s mission to its limits and became one of the most significant encounters in UFO history. See more in Season 1, Episode 8, "Sightings in the Sky." New Episodes Fridays at 10/9c on HISTORY! Stay up to date on all of your favorite The HISTORY Channel shows at http://www.history.com/schedule. #MonsterQuest Subscribe for more from MonsterQuest and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full episodes on our site: https://www.history.com/shows/monsterquest Check out exclusive The HISTORY Channel content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook X - https://histv.co/Twitter For centuries, people around the world have reported strange, and sometimes terrifying, encounters with what they describe as monsters. Now, for the first time, some of these witnesses are sharing their experiences. Each hour-long, themed episode of MonsterQuest unravels the mystery behind these chilling accounts. These extraordinary stories are brought to life like never before — challenging everything we think we know about the unknown. HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.