The UFO story started soon after June 24, 1947, when newspapers all over the United States carried the first flying saucer report. 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. In the eight years that have passed since Arnold's memorable sighting, the term has become so common that it is now in Webster's Dictionary and is known today in most languages in 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.

Obviously the term "flying saucer" is misleading when applied to objects of every conceivable shape and performance. For this reason the military prefers the more general, if 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 UFO's are nonsense. Fortunately, for the sake of good manners if for no other reason, the ranks of this knowing category are constantly dwindling. 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 UFO reports got better and better.

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.