The Oak Ridge Atomic Plant Radar-Visual Flap

Oak Ridge, Tennessee. 1950. The Atomic Energy Commission guarded a restricted zone here, with controlled airspace over the K-25, X-10 and Y-12 plants. At McGhee-Tyson Airport in Knoxville, an Air Force radar watched the sky.

On March 1, a radar station near Knoxville picked up an object "directly over Oak Ridge." Another return came the next day. Officials doubted the radar. Then came October.

October 12. 11:25 pm. Knoxville radar showed eleven objects, perhaps more, crossing the controlled area. An F-82 fighter was vectored onto two targets. On the ground scope, it appeared to intercept. The crew saw nothing, by eye or on their own radar.

October 15. Solway Gate. AEC Security Patrol Trooper Edward D. Rymer saw what looked like an aircraft "smoke writing." As it came closer, it took on "the shape of a bullet with a large tail," metallic gray, trailing a twenty foot ribbon. It drifted toward the witnesses at 3 mph, about 6 ft off the ground. Up close, sections of the tail glowed. Then it rose over a willow tree and slipped over a ridge. Two similar objects followed. McGhee-Tyson radar "indicated unidentified targets."

The next day, guard John Isabell watched a "silver-white spherical object" over K-25. It returned lower, "spinning about an axis," circled, vanished, then reappeared at very high altitude. Radar showed an indistinct target. On October 23, an ORNL employee saw an "aluminum flash" dropping fast over Benton Valley Road. A nearby counter recorded alpha and beta particles that could not be explained.

October 24. William Fry, Assistant Chief of Security for Project NEPA, was at the drive-in with his family. A light was changing "from reddish hue to bright orange and again to brilliant light blue." Air Force Major Lawrence Ballweg watched it through binoculars, "moving relative to the other stars." Radar held an unidentified target. It vanished at 7:20 pm, about when the light went out.

November 5. Don Patrick, an illustrator at Fairchild Aircraft, saw a translucent object, light grey with a dark core. It made "rapid, darting movements" and seemed to "change rapidly from pear shape to bean shape and other sausage-like shapes." Project Blue Book filed it as Unidentified.

Army CIC and AEC summaries admitted the agencies "fail to evolve an adequate explanation." Balloons, birds and mass hysteria were all rejected, because of "simultaneous witnessing with reported radar sightings; reliability of witnesses; detailed, similar descriptions by different persons." "The fantastic is generally rejected." The FBI logged 16 unidentified radar targets. J. Edgar Hoover ordered an inquiry into possible radar jamming. A research plan was drawn up. Then the sightings stopped.

Blue Book lists October 15, November 5 and December 18 as Unidentified. ATIC called the October 16 sphere a balloon. Venus was offered for October 24, but NICAP notes it was below the horizon. In 1976, geneticist Alan D. Conger claimed that he and Kimball C. Atwood III had launched helium balloons carrying a foil radar target. "Neither Kim nor I had the guts to confess to our hoax." His story has never been tied to any particular 1950 event.

Bruce Maccabee traced the case through FBI files, and NICAP rebuilt its timeline. In May 2026, the Pentagon's PURSUE release added FBI file 62-HQ-83894, with Oak Ridge material. Col. C. D. Gasser had called earlier 1947 photos a "source of great concern to the military establishment of this country." The fear was Soviet nuclear-powered missiles. Not aliens.