September 11, 1967 — Kincheloe AFB, MI
10:42 p.m. According to radar operators at Kincheloe AFB [now Chippewa County International Airport] south of Sault Ste. Marie, Michigan, more than 20 radar targets appear and disappear over the middle of Lake Superior over an 80-minute period, tracked at speeds of up to 2,000 mph, sometimes turning at sharp right angles and involving separation and merging of distinct targets. Radar at Duluth, Minnesota, has also picked up the targets. The Colorado project sends John Ahrens and Norm Levine to investigate. They check out rumors of visual sightings at Sault Ste. Marie, but these do not conform to the radar trackings. At Duluth, they draw a complete blank with denials all around. The returns are explained as anomalous propagation radar echoes in the final report. [Eberhart]
Record Card:
FlyObRpt:
Memos about Radar pick-ups / Denial:
Source:
“UFO Sighting Is Reported in Leelanau,” Traverse City (Mich.) Record-Eagle, September 12, 1967, p. 1;
Brad Sparks, Blue Books Unknowns Catalogue, Case 1749, p. 326;
David R. Saunders and R. Rogers Harkins, UFOs Yes! Where The Condon Committee Went Wrong, pp. 123–124;
Edward Condon, Final report of the scientific study of unidentified flying objects conducted by the University of Colorado, pp. 164–165;
NICAP, “17 Unknowns in 80 Minute Period”;
