What happened
A white-gray square, about 20 ft on a side and not shiny, rose above a ridge into the clouds and came back down, twice. Each pass took 30-40 seconds. Oak Ridge was a secret nuclear site and produced several Blue Book unknowns.
All cases / Rectangles / Oak Ridge square
December 7, 1951, 8:15 a.m.
Oak Ridge, Tennessee, USA
"square"The witness's own shape words
A white-gray square, about 20 ft on a side and not shiny, rose above a ridge into the clouds and came back down, twice. Each pass took 30-40 seconds. Oak Ridge was a secret nuclear site and produced several Blue Book unknowns.
J. H. Collins, Atomic Energy Commission guard
Filed by Project Blue Book as unknown.