and wrote the book The Report on Unidentified Flying Objects, which described the study of UFOs by the United States Air Force from 1947 to 1955. American scientist Michael D. Swords wrote that "Ruppelt would lead the last genuine effort to analyze UFOs".

Ruppelt implemented a number of changes: He streamlined the manner in which UFOs were reported to (and by) military officials, partly in hopes of alleviating the stigma and ridicule associated with UFO witnesses. Ruppelt also ordered the development of a standard questionnaire for UFO