Kenneth Albert Arnold (March 29, 1915 – January 16, 1984) was an American aviator, businessman, and politician. Arnold is known best for reporting what is generally considered the first widely publicized modern sighting of an unidentified flying object (UFO) in the United States, after claiming to have seen nine silver-colored discs flying in unison near Mount Rainier, Washington on June 24, 1947. After his alleged sighting, Arnold began investigating reports of UFOs, writing and speaking about the topic for several years afterward.
https://en.wikipedia.org/wiki/Kenneth_Arnold