Documents / Official release
This Federal Bureau of Investigation Seattle field office file (100-18945) gathers flying saucer material from 1952 to 1960. It holds newspaper clippings, citizen complaint forms and agent memoranda about sightings over Pasco, Kennewick, Seattle, Richland and the Hanford reservation, Spokane and other Washington locations. The file records 1952 agreements with military intelligence on passing reports to OSI and the Air Force. One Hanford sighting from 1953 was attributed to a meteorological balloon. The FBI itself carried out no investigations.
From the source:Release of 2026-06-12 Incident: July 1952-1960, Washington State, United States. This file details an investigation of various sightings of Unidentified Flying Objects (UFOs) in Washington state between July 1952 and August 1960. This file includes memoranda and correspondence between the Federal Bureau of Investigation and the U.S. Air Force regarding UFO sightings.
“Anderson”1 page
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# Office Memorandum UNITED STATES GOVERNMENT TO : SAC, SEATTLE DATE: 9-29-56 FROM : ROBERT E. PRINGLE SUBJECT: UNIDENTIFIED OBJECTS REPORTED NEAR CAPE DISAPPOINTMENT - 9-28-56 At 4:30 PM this date the duty office U. S. Coast Guard called stating that he had advised this office on 9-28-56 of unidentified objects near Cape Disappointment. He stated that it had been determined that this was a "Mark Six, Aircraft Flare." He advised that others had been reported at Willapa, Point Granville and Neah Bay. He advised that all of these with the exception of Neah Bay had been destroyed by the demolition squad and that those at Neah Bay would be destroyed on Monday. He advised that a search was being made of the coast for any more of these objects due to the fact that so many had been reported. ALL INFORMATION CONTAINED HEREIN IS UNCLASSIFIED EXCEPT WHERE SHOWN OTHERWISE 100-18945-65 SEARCHED INDEXED SERIALIZED FILED OCT. 1 1956 FBI·SEATTLE
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Official release, from the pursue collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 55 pages are in the text index: search them above, or from the library's search.