"Roswell Incident," a conspiracy theory.

"Roswell Incident" is one of the most famous and influential UFO case in history, involving the crash of a flying saucer in 1947 in Roswell, New Mexico. This event marks the first time the U.S. military publicly acknowledged the existence of UFOs(though retracted within a day). With the declassification of CIA files and the revelations from "Alien Interview" and "Operation Zeta," the Roswell incident has become one of the strongest pieces of evidence for extraterrestrial civilisations.