UFO Case Report:

“Radar visual aircraft UFO encounter near

Hanford nuclear plant, December 10, 1952”

(UFOs AT CLOSE SIGHT, France)

The report contains a link to the 1952 Air Intelligence report 
100-203-79:

http://ufologie.patrickgross.org/htm/hanford10dec52.htm

Quote from the report:

“On December 10, 1952, at 19:20, the pilot and radar observer of 
a patrolling F-94 from Moses AFB spotted a light over Hanford’s 
Atomic Energy Commission’s nuclear plant, near Richland, 
Washington, while flying at 26,000 feet.”

Map of the Hanford Site, Washington State
(wikimedia.org) (wikimedia.org image)