Federal officials in Utah announced the disappearance of that mysterious 10 to 12-foot three-sided metal beam and blamed an “unknown party” for taking it away. Subscribe to GMA's YouTube page: https://bit.ly/2Zq0dU5 Visit GMA's homepage: https://www.goodmorningamerica.com Follow GMA: TikTok: tiktok.com/@gma Facebook:facebook.com/GoodMorningAmerica Twitter: twitter.com/gma Instagram: instagram.com/goodmorningamerica Watch full episodes: abc.go.com/shows/good-morning-america hulu.tv/2YnifTH #GMA #UtahMonolith #Monolith #Utah