The story told how nine very bright, disk-shaped objects were seen by Kenneth Arnold, a Boise, Idaho, businessman, while he was flying his private plane near Mount Rainier, in the state of Washington. With journalistic license, reporters converted Arnold's description of the individual motion of each of the objects, "like a saucer skipping across water", into "flying saucer," a name for the objects themselves.

Many years have passed since Arnold's memorable sighting, and the phrase has become so common that an entry was made in Webster's Dictionary, and it is recognized today in most languages throughout the world.

For a while after the Arnold sighting, the term "flying saucer" was used to describe all disk-shaped objects that were seen flashing through the sky at fantastic speeds. Before long, reports were made of objects other than disks, and these were also called flying saucers. Today the words are popularly applied to anything seen in the sky that cannot be identified as a common, everyday object.

Thus a flying saucer can be a formation of lights, a single light, a sphere, or any other shape; and it can be any color. Performance wise, flying saucers can hover, go fast or slow, go high or low, turn 90-degree corners, or disappear almost instantaneously.

Clearly the term "flying saucer" is open to interpretation when objects of every imaginable shape and performance are labeled as such. This is why the military preference is the more general, although less colorful, name: unidentified flying objects. UFO (pronounced Yoo-foe) for short.

Officially the military uses the term "flying saucer" on only two occasions. First in an explanatory sense, as when briefing people who are unacquainted with the term "UFO": "UFO, you know, flying saucers." And second in a derogatory sense, for purposes of ridicule, as when it is observed, "He says he saw a flying saucer."

This second form of usage is the exclusive property of those persons who positively know that all UFOs are nonsense. Fortunately, if only as a matter of coutesy, those in this category are reducing in number. One by one these people drop out, starting with the instant they see their first UFO.

Some weeks after the first UFO was seen on June 24, 1947, the Air Force established a project to investigate and analyze all UFO reports. The attitude toward this task varied from a state of near panic, early in the life of the project, to that of complete contempt for anyone who even mentioned the words "flying saucer."

This contemptuous attitude toward "flying saucer nuts" prevailed from mid-1949 to mid-1950. During that interval many of the people who were, or had been, associated with the project believed that the public was suffering from "war nerves."

Early in 1950 the project, for all practical purposes, was closed out; at least it rated only minimum effort. Those in power now reasoned that if you didn't mention the words "flying saucers" the people would forget them and the saucers would go away. But this reasoning was false, for instead of vanishing; the quality of the UFO reports improved.

Airline pilots, military pilots, generals, scientists, and dozens of other people were reporting UFO's, and in greater detail than in reports of the past. Radars, which were being built for air defense, began to pick up some very unusual targets, thus lending technical corroboration to the unsubstantiated claims of human observers.

As a result of the continuing accumulation of more impressive UFO reports, official interest stirred. Early in 1951 verbal orders came down from Major General Charles P. Cabell, then Director of Intelligence for Headquarters, U.S. Air Force, to make a study reviewing the UFO situation for Air Force Headquarters.

The study was given the code name Project Blue Book. It was under the supervision of "EJR" of impeccable credentials until late in 1953. During the Second World War EJR was a B-29 bombardier and radar operator. He restarted college after the war, and before long, gained his aeronautical engineering degree. To keep his reserve status while in school, he flew as a navigator in an Air Force Reserve Troop Carrier Wing.

During the compilation of Project Blue Book, EJR and his team traveled almost half a million miles. They investigated dozens of UFO reports, and read and analyzed several thousand more. These included every report the Air Force had ever received.

There were ten regular staff on Project Blue Book plus many paid consultants representing every field of science. Everyone involved had Top Secret security clearances so security was not an issue in the investigations. This organization was made up of a reporting network consisting of every Air Force base intelligence officer and every Air Force radar station in the world, together with the Ground Observer Corps of the Air Defense Command. This reporting net sent Project Blue Book reports on every conceivable type of UFO, by every conceivable type of person. What did these people actually see when they reported a UFO? Putting aside truly unidentifiable flying objects for the present, this question has several answers.

Often it has been positively proved that people have reported balloons, airplanes, stars, and many other common objects as UFOs. The people who make such reports don't recognize these common objects because something in their surroundings temporarily assumes an unfamiliar appearance.

Unusual lighting conditions are a common cause of such illusions. A balloon will glow like a "ball of fire" just at sunset. Or an airplane that is not visible to the naked eye suddenly starts to reflect the sun's rays and appears to be a "silver ball". Pilots in F-94 jet interceptors chase Venus in the daytime and fight with balloons at night, and people in Los Angeles see weird lights.

So did Project Blue Book prove that UFOs exist? The hassle over the word "proof" boils down to one question: What constitutes proof? Is a UFO required to land at the River Entrance to the Pentagon, in front of the offices of the Joint Chiefs of Staff? Can we be convinced when a ground radar station detects a UFO, sends a jet to intercept it, the jet pilot has visual contact, locks on with his radar, but the UFO streaks off at an amazing speed? What further proof is required when a jet pilot fires at a UFO and sticks to his story, despite being threatened with a court-martial? Does this constitute proof?

Project Blue Book recorded the facts; but you must decide for yourself.