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Kenneth Arnold holds artist conception based on his description of the UFOs |
After news of Arnold’s sightings hit the media, similar sightings began to be reported in increasing numbers across the United States. Also in July 1947, a Roswell, New Mexico newspaper claimed that personnel of the nearby U.S. Army airfield had recovered a crashed flying saucer. The Army, in turn, explained that the crash was that of a wrecked weather balloon. (Though the Roswell incident was mostly forgotten until the late 1970s, around that time several eyewitnesses began to come forward claiming the “weather balloon” was in fact an alien craft; conspiracy theories regarding Roswell still abound among ufologists.)
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Kenneth Arnold’s report to Army Air Forces (AAF) intelligence, dated July 12, 1947, which includes annotated sketches of the typical craft in the chain of nine objects. |
Governmental Response
In response to the increasing number of UFO sightings that followed Arnold’s report, the U.S. Air Force began an investigation of these reports, called Operation Sign, in 1948. Among the initial theories of the project’s participants was that the UFOs were actually types of sophisticated Soviet aircraft, although there was also a hypothesis that they might be extraterrestrial spacecraft.
Regarding the June 1947 sighting over Mount Rainier, Air Force investigators deemed both Arnold and the prospector to be credible witnesses, but concluded that what they had seen was a mirage, not actual flying ships.