SERPO

Project Serpo is the name of an alleged top-secret exchange program between the United States government and an alien planet nicknamed Serpo. Details of the exchange and what it was supposed to have entailed have appeared in several UFO conspiracy stories over the last 30 years, including one incident in 1983 in which a man identifying himself as USAF Sergeant Richard C. Doty contacted investigative journalist Linda Moulton Howe claiming to be able to supply her Air Force records of the exchange for her HBO documentary "The ET Factor"; only to pull out without providing any evidence to substantiate his story, and one incident in 2005 when a series of emails were sent to a UFO discussion group run by Victor Martinez claiming that the project was real.

Many think Steven Speilberg's, CLOSE ENCOUNTERS OF THE THIRD KIND, was based on SERPO.