DOW-UAP-D176: AARO triangular-object witness debrief
AARO’s 2026 witness debrief records law-enforcement reports of a silent, matte-black triangular object seen visually and through thermal equipment. The account describes a vertical rise, hover and rapid canyon descent, while explicitly cautioning that these are witness interpretations; speed was not instrumentally measured, and a subsequent ground survey reportedly found no physical trace.
- File
- Document · Release 07
- Date
- June, 2026
- Location
- Western United States
- Extent
- 3 pages
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Probed Assessment
AARO records a detailed but unverified visual and thermal witness account; the memo does not establish the object’s identity or measured flight performance.
Key takeaways
- Two main witnesses and a third observer are described, with identifying details redacted.
- The account distinguishes a ten-second ascent, twenty-second hover and two-to-three-second departure.
- Sensor limitations, estimated range and unmeasured speed constrain performance claims.
- A reported ground survey found no trace, and the witnesses reported no physiological or equipment effects.
Why it matters
The memorandum preserves both the reported encounter sequence and explicit evidentiary limits, allowing readers to distinguish testimony from measurement.
Corroboration
Additional witness testimony is described within this record. The released memorandum contains no instrumented speed measurement or independent physical confirmation.
Open questions
- • What underlying sensor recordings, if any, remain available?
- • What additional information could establish range, scale and speed?
Probed separates this editorial assessment from the source claims below. It summarizes what the released artifact supports; it is not independent verification.
Official Description from War.gov
This document is a memorandum for record documenting an AARO witness debrief concerning reported unidentified anomalous phenomena (UAP) observations at a sensitive national security site in the western United States over two days in 2026. AARO considers this incident to warrant further investigation due to the close alignment of the phenomena’s reported morphological features and kinematic profiles with those of other reported incidents in the western United States region. The memorandum records an interview with two Federal Special Agents and incorporates a corroborating account from a third official positioned at a separate observation post. The memorandum describes a primary event in which the reporting individuals stated that a triangular object rose vertically, remained stationary, and then banked and descended into a canyon. It records their descriptions of the object’s shape, color, apparent thermal signature, perceived lack of conventional propulsion features, and absence of an associated audible signature. The memorandum further records a secondary observation on the following evening, and a subsequent ground search that found no visible debris or evidence of an impact in the accessible survey area. The file is an investigative record preserving witness accounts, chronology, and associated analytic support material developed by the All-domain Anomaly Resolution Office (AARO) and does not present a conclusive finding regarding the nature or origin of the reported object or objects. All descriptive and estimative language reported by the individuals interviewed reflects their subjective interpretations at the time of the event. Such characterizations should not be interpreted as a conclusive indication of the presence or absence of any intrinsic object features or performance characteristics.
Preserved verbatim as source metadata. This wording is separate from Probed’s file-specific description and assessment.
File Context
Related entities
Tracker findings
Memo combines two primary witnesses and a third account
The memorandum describes two primary interviewees and an additional corroborating witness, with their identities and the event’s precise date or location redacted.
Witnesses described a matte-black triangle
The witnesses reported a matte-black triangular object with an estimated 13–15-foot wingspan, 6–9-foot fuselage and 1–2-foot thickness; those dimensions are witness estimates.
Thermal image was described as uniform, without visible exhaust
The account describes the airframe as thermally uniform, with no localized exhaust gradient or visible propulsion features; this is reported sensor interpretation.
A blocked tripod view led to handheld observation
Terrain prevented quick relocation of the primary tripod-mounted thermal system; Source 2 instead carried binoculars and a handheld thermal monocular.
Distances were estimates
The memorandum places the estimated range between 1.4 and 3.2 miles, using terrain references rather than reporting an instrumented range measurement.
Ground search recovered no evidence
A ground survey the following morning reportedly found no wreckage, ground scarring or vegetation damage in the canyon drainage.
No recording accompanies the dusk sighting
The narrative describes favorable late-dusk conditions with negligible cloud cover and a residual sunset backdrop; it does not establish daylight visibility or a recorded video.
Release provenance
- Release
- Release 07
- Official ID
- release-07-file-003-dow-uap-d176-triangular-uap-aaro-memorandum-for-record-2026
- Cleared
- Oct 23, 2026
Referenced Timeline
AARO records a witness debrief
The memorandum records the witnesses’ 2026 account; the precise incident date and location are redacted.
Source Claims
Claims are attributed to the released source and remain distinct from Probed’s assessment and tracker findings.
AARO’s memorandum explicitly warns that the descriptions reflect the reporters’ interpretations and do not conclusively establish an object’s intrinsic features or performance.
Such characterizations should not be interpreted as a conclusive indication of the presence or absence of any intrinsic object features or performance characteristics.
The memorandum describes two primary interviewees and an additional corroborating witness, with their identities and the event’s precise date or location redacted.
Primary Interviewees: - 1843(a)(2) (SOURCE 1): 1843(a)(2) 1843(a)(2) 1843(a)(2) (SOURCE 2): 1843(a)(2) 1843(a)(2) 1843(a)(2) Additional Corroborating Witness: 1843(a)(2) (SOURCE 3): 1843(a)(2) 1843(a)(2)
The witnesses reported a matte-black triangular object with an estimated 13–15-foot wingspan, 6–9-foot fuselage and 1–2-foot thickness; those dimensions are witness estimates.
It had an estimated thirteen-to-fifteen- foot wingspan, apparent six-to-nine-foot fuselage length, and a maximum vertical thickness of roughly one to two feet.
According to the debrief, the object rose vertically for about ten seconds and then hovered for about twenty seconds above the ridgeline.
during the controlled vertical ascent of approximately ten seconds. ... entered a stable hover for an estimated twenty seconds.
The account describes the airframe as thermally uniform, with no localized exhaust gradient or visible propulsion features; this is reported sensor interpretation.
In the infrared spectrum it displayed a spatially uniform thermal signature across the entire airframe without localized thermal concentrations, exhaust gradients, or discrete heat sources associated with propulsion.
Source 3 reportedly detected the object with long-range thermal equipment at 2023L and alerted Sources 1 and 2, who moved to obtain a westward view.
At 2023L, SOURCE 3, positioned at the secondary observation post scanning westward with long-range thermal equipment, detected an elevated object transiting over the ridge line
Terrain prevented quick relocation of the primary tripod-mounted thermal system; Source 2 instead carried binoculars and a handheld thermal monocular.
Terrain conditions precluded quick relocation of the primary tripod-mounted thermal system. SOURCE 2 noted he advanced with binoculars and a handheld thermal monocular;
The memorandum places the estimated range between 1.4 and 3.2 miles, using terrain references rather than reporting an instrumented range measurement.
Range to the object was bounded between approximately 1.4 and 3.2 miles west of the primary observation post by terrain cross-reference.
The witnesses compared the terminal flight to a military fighter jet, but AARO records that no instrumented speed measurement was obtained.
No instrumented speed measurement was obtained.
The reported final maneuver was a bank and terrain-following descent into a canyon, lasting about two to three seconds before the terrain obscured the object.
The entire horizontal transition, bank, and descent lasted approximately two to three seconds before the craft disappeared behind intervening terrain.
The memorandum says infrared tracking was lost when the apparent acceleration exceeded the handheld monocular’s narrow field of view; unaided viewing continued briefly.
Infrared tracking was lost due to the sudden acceleration exceeding the narrow field of view of the handheld monocular;
A ground survey the following morning reportedly found no wreckage, ground scarring or vegetation damage in the canyon drainage.
A ground survey of the canyon drainage conducted the following morning located no wreckage, ground scarring, or vegetation damage.
The collector notes that the two main witnesses had operational experience with unmanned aerial systems and conventional aircraft, and judged the reported silence unusual.
SOURCE 1 and SOURCE 2 have extensive operational experience working alongside government agencies and academic studies utilizing unmanned aerial systems (UAS)
The memorandum reports no physiological effects, anomalous odors, electromagnetic interference, signal degradation or unusual equipment readings.
No anomalous odors were noted. No electromagnetic interference, signal degradation, or anomalous sensor readings were recorded on personal or agency equipment.
The narrative describes favorable late-dusk conditions with negligible cloud cover and a residual sunset backdrop; it does not establish daylight visibility or a recorded video.
Weather conditions were highly favorable for both visual and electro-optical collection, with unrestricted line of sight, negligible cloud cover, and late-dusk illumination.
Source Material & Evidence
Research Map
Lines appear only when two entities share a row-level source claim or dated timeline event. Unconnected nodes remain visible without implying a relationship.