Richard Hall:

I think it's the same case reported in Flying Saucers From Outer Space, pp. 189-191. (See below)

(Fran Ridge: Project Blue Book documents confirm this case and that Colonel "Low", the F-84 pilot, is actually Colonel Blakeslee. Other than the name, Keyhoe's account is, again, incredibly accurate, and indicative of the reliability of his written word, especially when it came to actual intelligence reports.)

Update by Dan Wilson:

Before Riordan came that evening, I looked over the two sightings Al had cleared. The first Intelligence report covered the rotating lights report which Riordan had mentioned. Though the saucer had been sighted by several air crews and tracked by ground radar, the detailed report was made by Colonel Curtis Low, commander of the fighter escort wing in Japan. (As Colonel Low was mentioned in a news dispatch which briefly described the incident, I am using his right name.)

The Intelligence officer who interrogated Colonel Low had been seriously impressed by the wing commander's account.

"The pilot reporting," he said, "has held responsible command assignments for some time. The accuracy of his statements was consistent despite repetitive interrogation. His sequence of times, locations, and descriptions did not vary at any time. He is stable and thoroughly reliable. There were no activities of a meteorological nature or any inversion which could account for these sightings . . . This is a graphic description of an object falling definitely into the family of UFO."

The action began in the early evening of December 29, 1952. At about 7:30 P.M. an Air Force radar base in northern Japan received a call from a B-26 crew.

"We've just sighted a UFO. It looks like a cluster of lights—red, white, and green."

Moments later the Air Force radar men picked up the UFO. But because of the B-26's low speed, no interception could be made. At 7:45 an F-94 pilot radioed in, reporting the same type of device. The call was overheard by Colonel Low, who was flying his F-84 jet fighter at 27,000 feet.

Three minutes later the wing commander sighted the strange machine, easily identified by its red, white, and green lights. He called Ground Control and was asked to try an interception.

As he climbed, Colonel Low switched off his lights. The object's lights did not change—proof that it was no canopy reflection. Keeping his own lights off to avoid detection, Low climbed to 35,000 feet. When he got closer, he saw that the saucer's lights were revolving in a counterclockwise direction—a steady rotation between eight and 12 times a minute.

Beside the shifting colors, Low could see three fixed shafts of white light shining outward. Apparently one part of the machine was rotating, but the change of colors was puzzling. At times the saucer was one solid color, white, green, or red. In between, the wing commander saw brief combinations—red-white, red-green, and green-white. But the three white beams remained constant.

After watching the device for a moment longer, Colonel Low opened his F-84 to full power. Racing in at over 500 miles an hour, he tried to close the gap. Apparently his unlighted plane was not seen for a second or two. Then the saucer increased its speed. Gradually pulling away, it disappeared in 30 seconds.

Five minutes later, circling at 35,000 feet, the wing commander saw the machine again. As before, it was at his level, but now moving parallel with the F-84. This time, as a test, Colonel Low left his lights on when he tried to close in. Immediately turning west, the strange craft speeded up, so swiftly that it vanished in five seconds.