United States.Two nights of slow thermal objects, calibrated against a Black Hawk

In 2026, a security employee at a sensitive federal site in the western U.S. —with no aviation training but some private pilot flight time— was on shift with a colleague when, at approximately 1604 hours, he was alerted to a radio-frequency detection: a 5-to-10-second burst emission at roughly 10,000 feet MSL, on an initially unknown bearing. Further communication clarified a request to observe on bearing 58 degrees. Within a few minutes, the witness aimed a thermal optical device in that direction and saw a black object in the sky, moving slowly. He took photographs using the optical device itself. While observing, a second object appeared to the right of the first, and he took additional photos and video. Both objects moved together, at the same speed, and appeared 'black hot' —i.e., cooler than the background— in the thermal image. He lost sight of them as they moved out of range. Total observation time was about 5 to 10 minutes; he could not estimate exact altitude or speed. The objects were flying above the mountain line, heading southeast, roughly 58 to 62 degrees. He was the only person present who saw them, and the only one who used the optical device; the photographs were provided to the FBI agent who took his statement.

The following night, an FBI Special Agent, positioned in the same general observation area, filmed a thermally 'elevated' aerial object —that is, hot, unlike the cold objects from the previous night— in the same general western sector and on a similar heading. The object appeared roughly two ridgelines farther west than the prior night's observation point; given the greater distance and terrain separation, the agent could not identify specific physical characteristics or determine its exact configuration, but the object presented as hot on thermal observation and appeared to be flying southbound, consistent with the general direction observed the previous night. During the same operational period, the agent also recorded video of a U.S. Army Black Hawk helicopter operating in the same general area, with the explicit purpose of establishing a visual and thermal reference point for scale, flight characteristics, and comparative size assessment. Based on that comparison, the unidentified object appeared to be approximately half the size of the Black Hawk —an estimate based solely on observed appearance, distance, and available reference footage. The agent could not determine whether it was fixed-wing, rotary-wing, or another type of unmanned aerial system, and eventually lost sight of the object as it continued southbound and was lost to terrain and distance.

Against the more narratively striking files in this batch, this case earns its place through method, not drama. The RF-detection → thermal-camera → photography sequence is, in essence, a surveillance protocol working exactly as designed: someone detects an anomalous emission, points an optical sensor at the indicated bearing, and documents what they find. That what they found were two black objects moving slowly in formation is not, on its own, evidence of anything anomalous — it's directly consistent with a pair of commercial or military drones operating near a sensitive facility, precisely the scenario an RF detection system is built to flag.

The second statement contributes more methodological discipline than narrative substance: the agent, aware he couldn't judge the object's size without a reference, deliberately filmed a known Black Hawk in the same area to calibrate the comparison — a rigor uncommon in the genre, which reduces (without eliminating) the margin of error on the 'half a Black Hawk' estimate. That the first night's object appeared 'cold' (black hot) and the second's 'hot' is a difference that could reflect different viewing angles, different surface types, or simply two genuinely different objects with no necessary relation — the file doesn't resolve it.

The posterior reflects that conservative reading: the largest mass sits on `mundano_natural` (0.55, `misid`) because an RF-detected drone swarm is, by far, the most parsimonious explanation for slow, formation-flying objects with no extraordinary maneuvers, near a national-security installation. The case enters the corpus not because it's extraordinary, but because it's exactly the kind of routine, technical, undramatic file that makes up most of real UAP investigative work — the necessary counterweight to the more spectacular cases in the same batch.