UAP Reported at Sandia Base, 1948-1950
A 116-page file from the Armed Forces Special Weapons Program — the classified successor to the Manhattan Project — documenting 209 UAP sightings clustered around Sandia Base, America's nuclear weapons hub, between 1948 and 1950. Witnesses describe green orbs, discs, and fireballs maneuvering, vanishing, or exploding overhead, with investigators also analyzing unexplained copper powder residue found at some sighting locations. The concentration of incidents at the nation's most sensitive nuclear facility gives this record unusual weight, and several of these cases directly seeded Project Grudge, making it a foundational document in the early institutional history of U.S. government UAP investigation.
This file contains 116 pages of documentation from the Armed Forces Special Weapons Program (AFSWP) – the direct, post-World War II successor to the Manhattan Project – and from the U.S. Air Force – relating to a series of sightings and investigations in Sandia, New Mexico, from 1948-1950. This file contains 209 sightings of “green orbs,” “discs,” and “fireballs” reported near the military base. Witnesses reported unidentified anomalous phenomena (UAP) maneuvering, flying out of sight, disappearing, or exploding. The documents also include the results of contemporary investigations into residual copper powder found in some areas where sightings were reported. A few of these investigations became the basis for Project Grudge, which collected reports of unidentified flying objects from various other military installations – also included in this collection.