The 4602d AISS History, 1956: Six Months of UFO Reports and No Unknowns
The Air Force's UFO field squadron logged 170 reports in early 1956 and graded none of them unknown. Its monthly summaries blame balloons, aircraft and, above all, Venus.
Between January and June 1956, the Air Force squadron responsible for investigating UFO reports across the United States received 170 of them and classified not one as unknown. This unit history shows how it reached that result, month by month, in the squadron’s own summaries. They include Venus hanging low in the western sky, a fireball over Puget Sound, and a newspaper clipping blaming Air Force balloons for 90 percent of flying saucers.
What this record is
This is the semi-annual history of the 4602d Air Intelligence Service Squadron, an Air Defense Command unit headquartered at Ent Air Force Base, Colorado Springs, for 1 January to 30 June 1956. The title page (page 5 of the PDF) names First Lieutenant Victor R. Hofmann as squadron historian and Colonel John W. Meador as commander. The PDF is 706 pages long. The narrative takes up about 23 typed pages, and the rest is supporting documents grouped under Tabs A to D. The history was classified CONFIDENTIAL, and the Air Force Declassification Office stamped it declassified in full on 5 May 2025 as case 342UAP00008.
Bound in front of the history, on page 3 of the PDF, is an unclassified Headquarters USAF letter of 9 April 1976 signed by Major Robert S. Andress. It answers a Freedom of Information Act request dated 22 January 1976 for two later 4602d histories. It says that Chapter VI and several appendices of the history for 1 January to 2 July 1957 concern a classified interagency effort, “called Operation DOG PATCH by the USAF and Project GOULASH by the CIA,” which the Air Force could not declassify. It adds that those portions “make no mention of unidentified flying objects,” and that the UFO material in the 1957 history is on its pages 17 to 19 and in Appendices 14 and 15, all releasable. A handwritten addition says the “For Official Use Only” marking on the UFOB monthly summaries in the July to December 1956 history could be removed. The letter shows that the UFO content of these histories was being requested and released under FOIA by 1976. Neither of the histories it discusses appears in this PDF.
What it says about UFOs
Forty pages of the PDF mention UFOs. Most of them, pages 407 to 467, are the squadron’s six Monthly UFOB Summaries for January to June 1956, filed as supporting document 22. The narrative covers the subject in one paragraph.
That paragraph, on page 41 of the PDF, says the UFOB program “continued, as energetically as ever before,” but that reports fell 23.5 percent from the previous half-year. By 30 June the squadron’s running total was 712 sightings, of which 170 came in during this period. The historian notes a trend “away from unknown and insufficient evaluation data to known causes,” a large rise in astronomical explanations, and a concentration of reports in the eastern half of the country. The operations chapter (page 35 of the PDF) lists UFOBs as one of four main activities, alongside liaison, Project Team One and parachuting. It is glad that large side projects such as Moby Dick had ended, since personnel, money and time were “badly needed” for the core programs.
The monthly summaries follow a fixed pattern: a count, a breakdown by conclusion, a list of investigations, a running comparison with 1955, a “Current Situation” section, and an outline map of the country with each sighting plotted by category. The monthly counts are 22 in January, 26 in February, 40 in March, 21 in April, 29 in May and 32 in June, which add up to the 170 in the narrative. The “Unknown” line reads zero every month. The squadron authorized between one and seven full follow-up investigations each month, plus a few “limited” investigations done by mailing the witness a questionnaire (ATIC Form 164). The cases named include Seattle, Wallkill and Long Island in New York, Wurtsmith Air Force Base in Michigan, Sauvies Island in Oregon, a March cluster at Traverse City, Leland and Cedar in Michigan, Hampden-Sydney in Virginia, Pueblo in Colorado, Oklahoma City, Morrisville in Vermont, two “air-visual” sightings by aircrew over Virginia and Louisiana, and Baltimore. Later summaries report how the open cases were closed. All three Michigan cases were resolved as astronomical. Morrisville and the Louisiana air-visual case were resolved as balloons, the Virginia one as astronomical, and a December 1955 airborne sighting over South Carolina as “Possibly Astronomical: Venus” (page 411 of the PDF). A few, such as the second Seattle report and cases at Banning and Winchester in California, were still marked “Not Concluded” when the history closed.
Each summary compares the running figures for 1956 with the final 1955 results. By June (page 461 of the PDF), the 1956 figures were 17.7 percent balloon, 25.9 percent aircraft, 40.0 percent astronomical, 9.4 percent other, 7.0 percent insufficient data and 0.0 percent unknown. The final 1955 figures were 26.4, 24.8, 23.5, 14.5, 7.7 and 3.1 percent. The 1955 monthly counts peak at 57 in July, and the twelve months total 392 reports. The squadron’s own tables are not perfectly consistent. The June running table gives January 1956 as 23 and May as 23, while the monthly summaries report 22 and 29.
The “Current Situation” notes show what the squadron thought its reports were really about. The January summary (page 413 of the PDF) reprints an Air Force Times item of 28 January 1956, headlined “Balloons May Increase ‘Flying Saucer’ Reports,” saying that project officials had “admitted that their balloons probably account for 90% of the ‘flying saucers’” reported in the United States. That figure is the newspaper’s, not the squadron’s. February’s notes (page 423 of the PDF) observe that 35 percent of that month’s reports came from Ground Observer Corps volunteers, and they explain how Venus, the brightest object in the evening sky, can seem to “drift, bounce, jump, glide.” The same notes say gun crews in both world wars wasted ammunition firing at it. In March about half the astronomical cases were put down to Venus and the rest to Jupiter, Sirius and meteors (page 433 of the PDF). The May summary quotes a report judged “definitely” Venus, describing a round light the size of a nickel at arm’s length, green in the center with red sides, dimming and brightening. It predicts that astronomical cases will fall sharply once Venus leaves the evening sky after June (page 453 of the PDF).
The June summary (pages 463 to 465 of the PDF) records a visit to squadron headquarters on 7 June 1956 by Captain G. T. Gregory, “ATIC UFOB Project Officer,” and Dr. J. Allen Hynek. They introduced a “sky diagram” on which witnesses could show time, course, speed and size on one sheet. It also describes a burst of reports from Portland to the Canadian border shortly after 10 p.m. on 30 June 1956: a brilliant flash crossing east to west, followed by a loud explosion. Two Air Force pilots near McChord Air Force Base saw a light brighter than a magnesium flare with a long blue tail shedding what looked like molten pieces. The squadron classed it as definitely astronomical, a meteor, and quoted a Tacoma newspaper account of the fireball.
Outside the appendix, UFOs appear as a line item in the budget. The fiscal 1957 request of 9 March 1956 (pages 83 to 87 of the PDF) budgets for about fifty UFOB investigation trips at twelve dollars a day in per diem, noting that under AFR 200-2 the squadron was responsible for “all UFOB” reports within the United States. A standard support agreement with host bases (page 135 of the PDF) asks that squadron members not be given extra duties that would keep them from UFOB investigations. The squadron’s policy guide (page 199 of the PDF) limits investigations that involve travel costs to a single investigator. The only mention of UFOs in the railroad liaison papers is a line in one railroad’s instructions (page 335 of the PDF). It asks employees to report anything that fell from or was found near “an enemy aircraft or flying object,” in the context of the squadron’s wartime crash mission.
Context
The 4602d took over Project Blue Book’s field investigations in 1953 and 1954, as the unit’s 1955 history documents in detail, and AFR 200-2 of August 1954 made it formal. Evaluation was still done at the Air Technical Intelligence Center, where Captain George T. Gregory ran the Blue Book office from 1956. The Blue Book overview covers the program from start to closure in 1969. The squadron was discontinued on 2 July 1957, which is why the 1957 history named in the FOIA letter ends that day. For the collection as a whole, see the Record Group 615 overview.
Status
The record shows a squadron closing cases efficiently and not recording a single unknown in half a year. It can be read in two ways. On one view, the investigators were getting better at recognizing Venus, balloons and aircraft, as the historian claims, and the monthly notes show them doing exactly that. On the other, ATIC’s instruction of February 1955 to reduce unknowns to “a bare minimum,” together with conclusions graded “possible,” made a zero easier to reach. The summaries give conclusions without the case files, so a reader cannot check any single evaluation from this record. The historical value is in the procedure and the proportions: what the Air Force was seeing in 1956 and how it chose to label it. The record contains nothing about crash retrievals or recovered craft, and the withheld project named in the 1976 letter, DOG PATCH/GOULASH, is described by the Air Force itself as having no UFO content.