In July 1948, in Pasco, Washington, Don Newman (former Air Force pilot) watched a disc-shaped UFO with a dome on top maneuvering over the city at 1:00 p.m. "The exterior finish appeared to be spun or brushed aluminum," Newman said in his report to NICAP. The UFO alternately slowed and accelerated rapidly, diving, and climbing over the area.

On March 18, 1950, Robert Fisher was flying his family from Chicago to Keokuk, Iowa. Near Bradford, Illinois, at 8:40 a.m., he spotted an oval, metallic-appearing disc ahead and slightly to the left of his Bonanza NC 505B. The UFO was moving on a course of about 120 degrees true. (Fisher was flying a southwesterly course, approximately 225 degrees.) The UFO shone in the sunlight, but when it flew below an overcast continued to glow, indicating that it was self-illuminated. It quickly moved off into the distance, at a speed estimated to be 600 to 1,000 mph.

Near Goshen, Indiana, April 27, 1950, a bright orange-red disc paced a Trans World Airways DC-3, which was piloted by Capts. Robert Adickes and Robert F. Manning. As the crew and many passengers watched, the UFO pulled alongside the plane. It looked "like a big red wheel rolling along." Each time the pilot moved toward the object, it moved away as if controlled by repulse radar. When the pilot turned, the disc dove (presenting an edge-on view) and sped off to the north toward South Bend.

On May 29, 1950, an American Airlines plane departed Washington, D. C., enroute south over Virginia. About 9:30 p.m., First Officer Bill Gates noticed a light approaching the airliner head-on and notified Capt. Willis T. Sperry. Flight Engineer Robert Arnholt also witnessed what followed. An unidentified object with a brilliant bluish light on the leading edge neared, and seemed to stop. Suddenly it darted to the left of the plane, stopped for a few seconds, then circled around to the right. There it was silhouetted against the moon, revealing a torpedo-shaped or narrow elliptical body. Finally the UFO sped away to the east. Captain Sperry called the speed "fantastic," and said it was "without a doubt beyond the limits of any known aircraft speeds."

A "perfectly round disc" hovering above the Hanford atomic plant, Richland, Washington, was observed by four veteran pilots July 5, 1952. The four Conner Airlines pilots were interviewed by United Press when they landed in Denver, Colorado, and their story was put on the newswires that day.