Project Serpo is an alleged top-secret exchange program between the United States government and an alien planet called "Serpo" in the Zeta Reticuli star system. Details of the alleged exchange program have appeared in several UFO conspiracy stories, including one incident in 1983—in which a man identifying himself as United States Air Force 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 ran by Victor Martinez claiming that the project was real. Some variations on the conspiracy story state that the name Serpo is the nickname of the extrasolar planet. Other versions state that it is a mispronunciation of either "Serponia" or "Seinu" by authorities involved in the project.