December 1998. As six astronauts aboard the space shuttle Endeavour begin assembling the first pieces of the International Space Station, a chilling discovery emerges. A strange, shadowy object appears in NASA footage, sparking questions that refuse to fade. Is it space debris, a classified craft, or something far more mysterious? Follow the clues behind this UFO mystery as experts revisit one of the most debated encounters in space exploration and uncover the secrets of the legendary Black Knight UFO. Watch NASA's Unexplained Files Season 1, Episode 3 now on Discovery Channel India to witness the mystery behind the Black Knight UFO. 🔔Subscribe Now! - https://www.youtube.com/@DiscoverychannelInd?sub_confirmation=1 🌍 Explore the World’s Greatest Mysteries: https://www.youtube.com/playlist?list=PLN4N_L1U4V6k5x_TLcFjME16xWvvd93Rs 🏕️ Watch Epic Survival Series: https://www.youtube.com/playlist?list=PLN4N_L1U4V6lP-kyI7OBnnCOfGHYU1t8y 👍Do Not Forget To Like, Share, and Comment on Our Videos. 📲Also, Follow Us on Social Media Facebook: www.facebook.com/DiscoveryChannelIndiaOfficial/ Twitter: twitter.com/DiscoveryIN Instagram: www.instagram.com/discoverychannelIn/ #discoverychannel #discoverychannelshows #discoverychannelindia