DOW-UAP-D102: The Project Blue Book File on the Tremonton Film, from "Unknown" to "Seagulls", 1952-1956

Source file: DOW-UAP-D102_Project-Blue-Book-File-on-Tremonton-Film-Utah-1952.pdf Originating agency: U.S. Air Force, Air Technical Intelligence Center (ATIC), Project Blue Book; with material from the Directorate of Intelligence, HQ USAF, the 28th Air Division, Hill AFB, the U.S. Naval Photographic Interpretation Center and Douglas Aircraft Company Document type: Blue Book case file (case 1377): record card, worksheet, teletypes, memoranda for record, correspondence, two laboratory analyses, a contractor study and press-related material Date: 11 August 1952 to 1 June 1956 (incident: 2 July 1952, 1110 MST) Classification: Mixed original markings (RESTRICTED; CONFIDENTIAL / SECURITY INFORMATION; FOR OFFICIAL USE ONLY), overstamped UNCLASSIFIED; declassified under Authority NND 923007; released 2026 Page count: 156 VIRIN: 260918-D-D0360-1091 PURSUE Release: 6

Summary

This is the Air Force's own case file on what its Directorate of Intelligence called, in October 1952, "possibly the best documentary evidence yet obtained on unidentified flying objects": about thirty feet of 16mm Kodachrome shot by a Navy chief photographer beside U.S. Highway 30S, north of Tremonton, Utah, on the morning of 2 July 1952. The folder is marked as Blue Book case 1377 and opens with a Project 10073 record card.

Its value lies less in any single verdict than in the sequence it preserves. The Blue Book worksheet was first marked "Unknown," with mirage, birds and aircraft listed as possibilities. Both laboratories that measured the film, the Photo Reconnaissance Laboratory at Wright Air Development Center (WADC) and the Navy's Photographic Interpretation Center, judged the images brighter than any bird could produce. Balloon specialists in Minneapolis thought they looked like pillow balloons, but no release could be traced. By 1956 Air Force memoranda described the case as settled: seagulls.

The pages also tell the physical story of the film: its brittle condition, the copies made from it, the detached Idaho footage, and a 1954 search in which neither the Air Force nor the Navy could say where the original was.

Research Article

The sighting and the photographer

Newhouse's letter of 11 August 1952, from the Aviation Supply Depot at the Naval Supply Center, Oakland, forwarded "One (1) fifty-foot roll of processed 16mm color motion picture film" to the commanding officer at Hill Air Force Base (p. 113; the same statement recurs at pp. 70 and 121). Driving from Washington, D.C. to Portland, Oregon, his wife noticed objects in the sky. He stopped, took his camera out of a suitcase and filmed a group "of about ten or twelve objects" moving west in rough formation. He listed a hand-held Bell & Howell Automaster with a 3-inch telephoto lens at 16 frames per second, the first few feet at f/8 and the rest at f/16, a change he admits produced "general under exposure." Near the end one object reversed course; he held the camera still and let it cross the frame three or four times. He used up the roll that afternoon on a mountain in Idaho.

HQ USAF received the film on 5 September and asked the 28th Air Division to interview him (pp. 11-13, 116). On 10 September the division's Director of Intelligence questioned Newhouse, his wife and their two children at their home in Berkeley (pp. 4-6, retyped at pp. 14-15). The family heard no sound, saw no trails and no aircraft, birds or balloons, and counted 12 to 14 light-colored objects at about 70 degrees elevation, with the sun almost overhead. The interviewer judged the couple "extremely honest and reliable" and recorded over 19 years of naval service, graduation from the Naval Photographic School in 1935 and more than 1,000 hours of aerial photography: Newhouse "could be classified as an expert photographer" (p. 6). A follow-up confirmed that the whole roll, Idaho scenery included, was shot hand-held (pp. 7, 17, 23).

First evaluations: an open question

The Project 10073 record card describes the objects as "sources of light or highly polished bodies," calls the source a naval photographer "considered an expert," and lists "Possible mirage effect" and "Possible migratory birds" (p. 2). Its conclusion box now carries a handwritten "Other: BIRDS." The worksheet tells a different story: its final evaluation is ticked "Unknown," with handwritten possibilities of a mirage (no inversion layer, but a steep lapse rate between 4,000 and 10,000 feet), migrating snow geese or seagulls, and aircraft, rated "highly improbable" (pp. 57-58). Weather sheets from Hill AFB show light winds and "No inversion layer present" (pp. 59-62). The Naval Observatory put the sun at 64.5 degrees elevation and 131 degrees azimuth (p. 117). A November query about balloons launched that day produced only a single weather balloon released at 0200 and another at 0800 (pp. 24-25).

The laboratories: brighter than birds

The WADC Photo Reconnaissance Laboratory returned its analysis on 10 October 1952 (p. 67; the report is at pp. 100-107, with a cleaner copy at pp. 136-144). It counted ten objects, too small to show any detail, and measured the single crossing object at about 2.1 degrees per second (Appendix I, p. 140). Its central finding was that the objects' brightness exceeded that of any natural diffusing reflector, "such as white birds against the sky" (p. 136). The objects were either non-spherical and "similar to bright metal in reflectance, or else variably self-luminous by some means," which ruled out large spherical balloons but not bright aluminum aircraft (pp. 136, 138). The lab added that the photography would be "extremely difficult to imitate" for fraudulent purposes (p. 139). A pencil note on the folder calls it an "Excellent analysis by film lab" (p. 8).

ATIC read it more coolly. Forwarding the film to Major Dewey J. Fournet at HQ USAF on 15 October, it proposed showing it to an ornithologist, perhaps at the Smithsonian, to judge whether the objects might be birds (p. 9). Fournet instead sought a second laboratory. His memorandum to the Director of Naval Intelligence, written on 24 October, called the movies "possibly the best documentary evidence yet obtained on unidentified flying objects" and asked for an independent Navy interpretation (p. 124).

The Navy Photographic Interpretation Center's progress report of 5 December 1952, signed L. W. Keith, answered tersely: "It appears to be a light source rather than reflected light"; no bird was "sufficiently actinic"; aircraft and balloons were ruled out (pp. 129-130). It derived a mean velocity of 653.5 mph for objects five miles away, a distance it concedes was "arbitrarily set," and ended with "Conclusions: None" (pp. 131-133). The Center's final report of 4 May 1953 is also here (pp. 71-77). It is the document released in PURSUE Release 5 as DOW-UAP-D098, with velocities up to 2,457 mph and accelerations to 965 g.

Balloons, gulls and the 1953 press release

In December 1952 Lt A. G. Flues of ATIC followed the balloon lead. A Navy officer at the Office of Naval Research office at the University of Minnesota, who had seen the film, thought the objects were pillow balloons but said the Navy had released none in that area; he named General Mills, Inc. as the only known manufacturer (p. 26). General Mills' balloon-research director said large numbers had been made for the "Crusade for Freedom" and released sporadically for publicity, which would make them hard to trace (p. 27). On 30 December the film was run eight times in the balloon room of the university's physics building for Navy personnel, two university balloon scientists and General Mills staff. The consensus was that the objects "resembled pillow balloons in flight very closely," though J. R. Smith of General Mills felt they were "a bit too bright and maneuvered a bit too fast" (p. 28). Nobody trusted the speed figures, "since all were predicated upon Newhouse's holding the camera still" (p. 29). General Mills had no comparable footage, and a list of balloon consignees is announced but not attached (p. 29). The companion photo file, DOW-UAP-D103, holds the General Mills balloon imagery.

By late January 1953 the press had learned of the film. A memorandum for record dated 11 February 1953 (pp. 37-39; the scan puts its second and third pages in reverse order) is the most candid document in the file. After summarizing both lab reports, it notes that two astronomers who heard a Navy briefing said the Navy's brightness measurements were wrong, "therefore, the results of the entire study were wrong" (p. 39). Officers first decided to release the movies without comment and hope no one asked about the Navy report, which the memo calls "a 'calculated' risk of another big 'flap'." Alternatives included filming gulls in Florida with a 3-inch lens, paying General Mills to fly pillow balloons in the same pattern, and filming two maneuvering aircraft (pp. 39, 38). The recommended line was that the Air Force "cannot positively identify the objects but they are reasonably sure that they are balloons or gulls," with the lab reports discounted for "meager data," because "It would be rather poor policy to state that the Navy had made an error in the beginning of their analysis" (p. 38).

The factual summary sent to Washington in early February already said that attempts to trace a pillow-balloon release near Tremonton "were negative" and that "Another strong possibility is that the objects were sea gulls," citing gull movies that showed bright spots of light "very similar to those in the movies" (pp. 30, 80). The file does not say when or by whom those gull films were made, and the 11 February memo still lists gull filming as work to be done. On 27 February ATIC proposed release wording that named "sea gulls, or balloons" because it "does not state that we can prove they are balloons or sea gulls" (p. 81). A Pentagon draft stressed that without reference points no size or linear speed could be derived (pp. 42-43). Newhouse accepted a copy in place of his original and asked to be described as "Chief Photographer, a commissioned warrant officer" (pp. 33-35, 44).

1954-1956: a lost original and a hardened verdict

In December 1953 Newhouse wrote that his copy had been damaged in a defective projector and asked to borrow the original for about four weeks (p. 54). ATIC could not produce it. Its January 1954 letter to Naval Intelligence asked after "the original of a 35 mm film" (p. 46). The Navy center replied that it had "never had possession of the original film," held only a 16mm copy plus 35mm positive and negative blowups, and added that the camera was understood to be a 16mm Revere, not the Bell & Howell that Newhouse named (p. 45). ATIC told Newhouse the original "may have deteriorated beyond the point where it could be successfully copied" and mailed him another copy (pp. 47, 49).

In 1956 the footage appeared in the United Artists documentary "Unidentified Flying Objects." R. M. L. Baker, Jr. of Douglas Aircraft analyzed a 35mm reprint supplied by the producers, since the original was not available (pp. 82-97). His table shows how everything hinges on distance: the single object would be moving at 27 mph if it were 1,000 feet away, but about 1,300 mph at ten miles (p. 85). He doubted that birds at the required distances would look like round dots, found balloons unlikely, and ended with "no definite conclusion" (pp. 86-88). ATIC's preview memorandum of 21 May 1956 rejected the documentary's "not aircraft, not balloons, not birds," reporting that two ATIC photo specialists had found "the presence of sea gulls on a number of frames" of the original that the Hollywood version did not show (p. 65). On 1 June 1956 a memorandum prepared for the Air Force press room in the Pentagon concluded that there was "little reasonable doubt that the UFOs in the Newhouse film were indeed seagulls" (p. 127).

What the file does not show

The 1956 memoranda credit the seagull conclusion to the original WADC analysis (pp. 65, 126). The WADC report in this same file says the opposite, placing the brightness beyond any white bird, and never mentions gulls. The frames said to show identifiable gulls are not reproduced, and the Douglas photographic figures are blank in this scan (pp. 92-94). The file does not mention the Robertson Panel, the scientific panel convened in January 1953, by name; the only outside scientists who appear are the two unnamed astronomers. It is also inconsistent on basic facts: 8, 8 to 12, 10, 10 to 12, 11 and 12 to 14 objects; seven or ten miles north of Tremonton; "two or three" or "three or four" passes; 16mm or 35mm (pp. 9, 46, 67); service number 177273 or 177283; 1,000 flying hours or, per Douglas, 2,200. Unrelated reports are filed at the start and end (a Phoenix fireball of 2 July 1952 at p. 3; an OSI report from Hanscom Field and a CIRVIS summary at pp. 151-156), together with two comic-book pages retelling Major Donald E. Keyhoe's version of the affair (pp. 145-146).

Significance

This is the primary record behind one of the best-known UFO films, and it shows the assessment changing without any new physical evidence. The measurements were made in 1952; what changed afterwards was the framing, driven by press pressure, the astronomers' critique and the need for a public line. Read together with the Navy report in DOW-UAP-D098, the balloon imagery in DOW-UAP-D103, Newhouse's personnel record in DOW-UAP-D104, the Washington correspondence in DOW-UAP-D105 (pp. 26-36) and the digitized film itself, DOW-UAP-PR159, it lets a reader check each stage against the others. The official blurb's summary, a shift from open possibilities to confident seabirds with distance, size and speed never fixed, matches the file. The file adds what the summary leaves out: that the laboratories which measured the film disagreed with that ending.

Key People

Locations

Incidents

Notable Quotes

"Loading it hurriedly, I exposed approximately thirty feet of film. There was no reference point in the sky and it was impossible for me to make any estimate of speed, size, altitude or distance." -- page 113

"It is believed Newhouse could be classified as an expert photographer." -- page 6

"The attached movies (see Incl. 1) are possibly the best documentary evidence yet obtained on unidentified flying objects." -- page 124

"It is believed to be reasonably certain that the reflection brightness of these objects exceeds that of any natural diffusing type of reflecting object, such as white birds against the sky." -- page 136

"None of the persons present placed much faith in the computations of angular velocity, since all were predicated upon Newhouse's holding the camera still." -- page 29

"It would be rather poor policy to state that the Navy had made an error in the beginning of their analysis." -- page 38

"The unanimity of opinion present in all evaluations made in this case leaves little reasonable doubt that the UFOs in the Newhouse film were indeed seagulls." -- page 127