PANTEX
The PANTEX plant in the Texas Panhandle — the assembly and disassembly point for the U.S. nuclear stockpile — sits at the center of one of the more concrete items in this cluster. The Umbra app indexes a Pantex Unidentified Object Incident Report that carries an enhanced image captured from a ground-surveillance radar tower. It is the rare nuclear-site entry that pairs a written report with imagery, and it reads exactly like what it is: a perimeter sensor logging something it could not name.
Most of this material reaches the public through Department of Energy records folded into the broader PURSUE release. Umbra presents each report as released — paraphrased context, original document, no embellishment.
LOS ALAMOS & THE PAJARITO LETTER
Los Alamos National Laboratory threads through the record in a quieter, more human register. One file is a letter to members of the Pajarito Astronomers club, announcing an upcoming meeting built around a talk by a Los Alamos-affiliated physicist, Dr. John Warren, titled "Why Should a Scientist be Concerned about UFOs?" It is a small artifact, but a telling one — the question being asked, in 1986, by people who worked at the edge of the bomb.
The laboratory's disclaimer travels with the document and Umbra carries it intact: Los Alamos states the event was not officially hosted by the laboratory, and that it holds no record of the subject matter discussed. The app indexes the file, not a claim about it.
JAMES TUCK CORRESPONDENCE
A second Los Alamos line runs through correspondence tied to James Tuck, a physicist associated with the laboratory, in the 1970s. It is the kind of paper that rarely surfaces — private letters, kept, then released decades later under PURSUE. Read alongside the Pajarito invitation, it sketches a long, low-volume curiosity about UFOs running through the people who built and minded the weapons.
SANDIA BASE, 1948–1950
The oldest entry in the cluster reaches back to the earliest atomic era. A Department of War historical record — "UAP Reported at Sandia Base, 1948–1950" — covers the years when Sandia, outside Albuquerque, was the Army's nuclear weapons hub. It places sightings at a nuclear site within the first years of the nuclear age, the same window that produced the Cold War's first flying-saucer flap. Umbra files it where it belongs, at the head of the timeline. Download the app to read the nuclear-site cluster end to end, original documents and all.
- DOE-UAP-D001Enhanced PANTEX imagery captured from a ground-surveillance radar tower, filed with the Unidentified Object Incident Report.
- DOE-UAP-D003Pajarito Astronomers invitation, 1986 — "Why Should a Scientist be Concerned about UFOs?", with the laboratory's disclaimer attached.
- DOE-UAP-D002James Tuck correspondence, 1970s — letters tied to a Los Alamos-associated physicist.
- DOW-UAP-D017UAP Reported at Sandia Base, 1948–1950 — a Department of War historical record from the early atomic era.
> Every nuclear-site report, indexed and readable — the original documents in your pocket.
