The Trump administration's second wave of UFO disclosures has unveiled a chilling series of mysterious sightings near America's principal nuclear weapons installation during the early Cold War. Newly released documents tied to Sandia Base in Albuquerque, New Mexico, headquarters of the Armed Forces Special Weapons Project—the military successor to the Manhattan Project—detail at least 209 reports of unexplained aerial phenomena between December 1948 and May 1950.
Bizarre Sightings and Security Alarms
The files describe bizarre 'green fireballs,' glowing discs, and unidentified objects streaking across the skies near sensitive atomic facilities. Intelligence officers scrambled to determine whether these incidents posed a national security threat. One report warned that the frequency of sightings had become so alarming that military and government intelligence agencies agreed an 'organized plan of reporting these observations should be undertaken.'
Scientific Investigations and Particle Collection
Scientists and military investigators were so disturbed by the incidents that they launched airborne particle-collection missions in hopes of discovering physical evidence. The documents reveal that investigators detected unusual copper-bearing particles in airborne dust samples after one fiery object exploded over New Mexico in July 1949. Researchers even debated whether the strange material drifting through the atmosphere could have originated from the unidentified 'fireballs' seen over the desert skies.
In one extraordinary passage, investigators admitted that if the copper particles truly came from the glowing objects, 'then the fireballs are not conventional meteorites.' The files include a May 25, 1950 intelligence summary from the Air Force Office of Special Investigations describing repeated sightings across New Mexico during a period when Sandia Base served as one of the nation's most sensitive nuclear weapons hubs.
Organized Reporting Plan
The report explained that military and intelligence officials became increasingly alarmed after waves of unexplained aerial sightings began appearing near atomic research and weapons facilities. 'The frequency of unexplained aerial phenomena in the New Mexico area was such that an organized plan of reporting these observations should be undertaken,' the report stated. Sandia Base handled military aspects of America's nuclear weapons program following World War II, and the newly released files repeatedly reference its connection to 'Special Weapons' operations and inspections tied to Strategic Air Command nuclear facilities.
Green Fireballs Over New Mexico
Several reports focused on mysterious 'green fireballs' repeatedly observed over New Mexico during 1949. One detailed scientific investigation, dated August 10, 1949, outlined attempts by researchers at the New Mexico School of Mines to collect airborne particles associated with a fireball seen over Socorro, New Mexico, on July 24, 1949. Investigators used special equipment capable of collecting microscopic airborne material in the hope that debris from the unexplained object might still be floating in the atmosphere.
According to the report, researchers found 'a large number of copper-bearing particles' in one collection sample taken along Highway 84 north of Route 66. Scientists described the material as unfamiliar granular particles, some measuring up to 30 microns across, while others appeared as opaque solid fragments. Another report noted that investigators found 'remarkable' spherical particles showing strong cobalt indications, with some particles described as 'perfect spheres' roughly 12 microns in diameter.
Uncertainty and Implications
The documents repeatedly stressed the uncertainty surrounding the strange material. 'It seems very hazardous to draw any definite conclusion associating the copper-bearing particles collected with the fireball,' one report cautioned. Still, the reports acknowledged that the possibility could not be dismissed. One intelligence memo stated that if future studies proved the particles were truly falling from the 'green fireballs,' then the objects could not be explained as ordinary meteorites because copper was 'one of the rarest of the elements found in meteorites.'
High-Altitude Interception Plans
The files also reveal that investigators considered deploying high-altitude aircraft above 40,000 feet to intercept material falling from the mysterious objects shortly after sightings occurred. Researchers believed rapid-response airborne missions could potentially capture particles directly from the objects' atmospheric trails before contamination from terrestrial dust occurred. One memo described plans for aircraft to fly through the exact atmospheric region beneath the objects' flight paths 'as soon as possible after the occurrence' of future incidents.
The newly released files stop short of concluding the objects were extraterrestrial, but they make clear that Cold War military and scientific officials viewed the incidents seriously enough to involve intelligence agencies, meteor specialists, and classified weapons personnel. The disclosures are likely to intensify long-running speculation surrounding Sandia Base and New Mexico's so-called 'Nuclear Triangle,' where UFO sightings have repeatedly been linked to America's nuclear weapons infrastructure for decades.
