According to Air Force records[I-2], on the morning of December 6, 1952, a B-29 bomber was over the Gulf of Mexico returning from a training mission. At 5:25 A.M. the student radar operator, using an uncalibrated set, observed four bright blips (radar jargon for bright spots on a radarscope; such a spot indicates the presence of an object reflecting the radar pulses, but does not reveal the nature or shape of the object). The blips were apparently returns from objects about twenty miles away, in no specific group, which rapidly moved off the scope. Similar groups of fast-moving blips appeared at intervals during a period of about five minutes, and appeared also on two auxiliary radarscopes. After the first set was calibrated, the blips reappeared; none was observed after 5:35 A.M. From the radar data estimates of size and distance were made; calculations based on these estimates indicated a probable speed of 5000 to 9000 miles an hour. During the ten-minute period two visual observations were made, lasting about three seconds, which bore no obvious relation to the radar observations: at the right of the plane one crewman saw a single blue-white streak going from front to rear under the wing, and another crewman saw two flashes of blue-white light. An explanation of the incident was not found immediately, and ATIC at first classified it as an Unknown. Some saucer enthusiasts interpreted the facts to mean that several groups of saucers had been in the area, machines flying so fast that they were visible only as blue-white streaks, whose presence was confirmed by radar. These conclusions were merely deductions from fact, not observed facts. The radarscope is not a camera and does not, at least at present, picture the shape or physical structure of the phenomenon it reports; it shows only spots of light that change position and size. Similarly, the blue-white streaks were mere flashes of light without size or shape. In a later study of the evidence, the Air Force experts recognized this incident as one of false targets on radar (see _Chapter_ VIII). The radar phantoms may have been caused by beacon returns triggered by another radar; by variations in the atmosphere; or, if “ducting” conditions existed, by reflections from objects that were far beyond the normal range of the radar set. The blue-white flashes had no relation to the radar returns and were probably meteors; the date corresponded with the beginning of the annual Geminid shower (see _Chapter_ V). This Gulf of Mexico incident is neither complicated nor puzzling. We mention it chiefly to illustrate why the saucer enthusiasts so often disagree with the conclusions reached by the Air Force experts. The amateur assumes that the instrument operated faultlessly and detected a solid object; he uses these assumptions to interpret the data, uses the interpretation as fact, and by this “bootstrap” process deludes himself into thinking he has proved what he assumed in the first place.