The Roswell Incident started in 1947 with the recovery of debris near Roswell, New Mexico. It later became the basis for conspiracy theories alleging that the United States military recovered a crashed extraterrestrial spacecraft. The debris was a military balloon operated from the nearby Alamogordo Army Air Field and part of the top secret Project Mogul, a program intended to detect Soviet nuclear tests. After metallic and rubber debris was recovered by Roswell Army Air Field personnel, the United States Army announced their possession of a "flying disc". This announcement made international headlines, but was retracted within a day. To obscure the purpose and source of the debris, the army reported that it was a conventional weather balloon.