Tremonton Film (1952) – PURSUE Files

The Tremonton film is about 30 feet of 16mm color movie film shot on July 2, 1952, by U.S. Navy Chief Warrant Officer Delbert C. Newhouse while driving with his family near Tremonton, Utah. Newhouse, a trained Navy photographer, reported 12 to 14 bright, reflective objects moving in a loose group across the sky. The film became one of the most studied pieces of evidence in Project Blue Book. On September 18, 2026, the Department of War republished the film and four related records as part of PURSUE Release 06.^[1]

The film

DOW-UAP-PR159, Historical Film of Reported UFOs, Utah, 1952 — official upload on DVIDS (public domain).

The version released is a digitized 16mm print held by the National Archives. According to the official description, the reported objects appear only in the first part of the clip; from the 55-second mark the reel switches to unrelated footage of what looks like a sewing-equipment demonstration, suggesting the surviving print was reused or spliced. The Idaho mountain scenery Newhouse said he shot on the rest of the roll is not included.^[1]

What the documents show

• Blue Book case file (D102). Rates Newhouse as an honest, reliable witness with more than 1,000 hours of aerial-photography experience. It shows the Air Force’s view shifting over several years: early notes weighed birds, balloons and a mirage without deciding; later assessments became more confident the objects were seabirds reflecting sunlight. The file also contains conflicting statements about whether the original was 16mm or 35mm film.^[1]
• Pillow-balloon file (D103). In December 1952 Blue Book asked General Mills, then the only maker of “pillow” research balloons, whether a release could explain the film. A review group of Blue Book staff and balloon specialists thought the objects looked and behaved like pillow balloons; one General Mills representative felt they were too bright and moved too fast. No matching balloon launch was ever found.^[1]
• Newhouse personnel record (D104). Newhouse’s final Navy service record, showing his career as a Photographer’s Mate and his retirement as Chief Warrant Officer 4. It supports the Air Force’s description of him as an expert photographer.^[1]
• Air Force “flying discs” file, Sept.–Dec. 1952 (D105). A broad collection of Director of Intelligence correspondence, report forms and case summaries; pages 26–36 cover Tremonton.^[1]

Analysis

Known explanations. Three explanations have been put forward over the years:

• Seabirds (most widely accepted). The Robertson Panel, a CIA-sponsored group of scientists that reviewed the film in January 1953, concluded the objects were probably birds such as gulls catching sunlight, and the Air Force’s later assessments in this file agree. Gulls are common around the Great Salt Lake and Bear River marshes near Tremonton.^[2]
• Pillow balloons. Considered seriously in late 1952 (D103) but never matched to an actual launch.
• Unexplained, self-luminous objects. The U.S. Navy Photographic Interpretation Laboratory spent roughly 1,000 hours on the film in 1952 and concluded the objects were not birds, balloons or aircraft and appeared to be self-luminous. The Robertson Panel criticized that study for using copies of the film and for not removing camera shake from its speed estimates.^[2]

The key problem, noted in the Air Force file itself, is that the film has no fixed reference points such as ground, clouds or aircraft. Without them, the objects’ distance, size and speed cannot be measured, so the “high speed” readings depend on assumptions about how still Newhouse held the camera.^[1] Most investigators today regard birds as the most likely answer, but the case is still debated because the witness was a trained photographer who said the objects did not look like birds to him.

New or previously released? Mostly previously released. The Tremonton film has been publicly known since 1952, appeared in the 1956 documentary Unidentified Flying Objects: The True Story of Flying Saucers, and the Project Blue Book case files have been available at the National Archives since 1976. What is new in this release is an official, high-quality digitization from the National Archives print, the Newhouse personnel record, and a single curated set of the related Air Force documents.^[3]

Released files

See also

• Project Blue Book
• Robertson Panel
• Delbert C. Newhouse
• Navy Photographic Interpretation Laboratory
• Washington, D.C. Flap (July 1952)
• Condon Report

Further reading

• Edward J. Ruppelt (1956). The Report on Unidentified Flying Objects (Amazon)

References

1. ^ U.S. Department of War (2026). PURSUE Release 06, files DOW-UAP-D102, D103, D104, D105 and PR159, with official descriptions. war.gov/ufo.
2. ^ Report of the Scientific Advisory Panel on Unidentified Flying Objects (Robertson Panel), January 1953; summary of Navy Photographic Interpretation Laboratory findings in the same proceedings.
3. ^ U.S. National Archives, Project Blue Book records (Record Group 341), opened to the public in 1976.