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SPEED: Second estimate was 1,656.71 miles an hour (almost three times faster than any known aircraft, conventional or experimental, at the time; since estimate of speed depends on knowledge of distance of an object, another estimate was afterward made by an Air Force scientist (based on a shorter distance) of 400 mph; the observer's original estimate (later corrected) was 1,200 mph). TACTICS: According to the observer, the UFOs flew in a chain-like line as if they were linked together, rather in the same manner of geese; every few seconds, two or three of the objects would dip or change course slightly; they flew in a line spread out over an estimated five miles. press interview, Mr. Arnold described the objects he saw as appearing like saucers skipping over water. Hence the phrase "flying saucer" was coined. He was interviewed at length by a representative from Headquarters of the Fourth Air Force, Office of the Assistant Chief of Staff, A-2 Intelligence, at Hamilton Field, California. Results of the interview were sent to Headquarters of the (then) U.S. Army Air Forces, addressed to the Commanding General, in Washington, D.C., on July 17, 1947. The interviewer made the following statement in his report: "It is the personal opinion of the interviewer that Mr. Arnold actually saw w what he stated that he saw. It is difficult to believe that a man of Mr. Arnold's character and apparent integrity would state that he saw objects and write up a report to the extent that he did if he did not see them. To go further, if Mr. Arnold can write a report of the character that he did while not having seen the objects that he claimed he saw, it is the opinion of the interviewer that Mr. Arnold is in the wrong business, that he should be writing Buck Rogers fiction." NUMBER OF OBJECTS: Nine. - OBSERVER RELIABILITY: Appeared to be good. SHAPE: Disc-shaped. DIMENSIONS: Two-thirds the size of a Douglas DC-4 transport. COLOR: Silvery bright when sunlight reflected off the objects. SOUND: None. ALTITUDE: Approximately 9,500 feet. COMMENT: This is the famous case of Kenneth Arnold, first person ever to sight a UFO. During a However, the conclusion of the Army Air Forces was that Mr. Arnold had seen a mirage because of