 On July 9, the Army Air Force Directorate of Intelligence, assisted by the FBI, began a secret study of the best of the flying saucer reports, including Arnold's and the United Airlines' crew.Three weeks later they issued an intelligence estimate describing the typical characteristics reported (including that they were often reported as disc-like and metallic) and concluded that something was really flying around.A follow-up investigation by the Air Materiel Command at Wright Field, Ohio arrived at the same conclusion.