Watch Project Blue Book, Tuesdays at 10/9c! In August of 2007, in the Mexican towns of Ciudad de Valles and Xilitla, reports of “a silver object falling from the sky,” and “a fireball coming down over a tree,” were called into the Center for Control. Our team will interview the witnesses who have collected evidence and visit sites where the area has been burned in Season 1, Episode 4, "Crash and Retrieval". #UFOHunters Subscribe for more from UFO Hunters and other great HISTORY shows: po.st/SubscribeToHistory Find out more about this and other specials on our site: po.st/History_UFOHunters Check out exclusive HISTORY content: History Newsletter: po.st/HistoryNewsletter Website - po.st/HistoryWeb Facebook - po.st/HistoryFacebook Twitter - po.st/HistoryTwitter HISTORY®, now reaching more than 98 million homes, 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, epic miniseries, and scripted event programming. Visit us at www.HISTORY.com for more info.