The U.S. Department of War released a new, unredacted FBI case file on May 8, 2026. It contains a letter from a Mexican inventor who claimed to have cracked the science behind “flying saucers.” The document is serial number 220. It is part of the broader PURSUE archive, a government push to declassify UFO records.
The file is not new in its entirety. The FBI says a partially redacted version already sat on its public vault. What changed is the completeness. The newly released version contains “several newly declassified pages and only minor redactions.” That matters. It means the government held back pieces of this story for decades, and only now let them out.
The centerpiece of serial 220 is a letter dated March 19, 1950. The author is Michel Angel Garcia Macias. He lived in Veracruz, Veracruz, Mexico. He described himself as a “Pianist Composer Discoverer and Ideographic Inventor.” He wrote to “the President of the Commission of Scientific Investigation of the United States of North America” in New York. Macias said he was sending his “STUDIES” because he believed it was his duty.
What were those studies? He offered theories on what he called “stratospheric aerostats.” He noted the public commonly called them “Flying saucers.” That is the language of 1950. The term “UFO” was not yet standard. The phrase “flying saucer” dominated headlines after pilot Kenneth Arnold’s 1947 sighting. Macias was responding to that public frenzy, but he claimed to understand the underlying mechanics.
The letter itself is one piece of a much larger file. The FBI’s official description says the full case file includes “investigative records, eyewitness testimonies, and public reports” covering UFOs and flying discs from June 1947 to July 1968. That is 21 years of material. It includes “high-profile incident accounts, photographic evidence from sites like Oak Ridge, TN, and technical proposals regarding potential propulsion systems.” Oak Ridge is significant. That was the heart of the Manhattan Project. It produced the atomic bomb. If someone photographed a flying disc there, the government would have taken that seriously.
The release of serial 220 under PURSUE is not an isolated event. It is one document in a collection the government has been slowly unsealing. The letter from Macias is a curiosity. A pianist-inventor from Veracruz, writing to a U.S. commission about aerostats. But the file also contains technical proposals on propulsion systems. That is the hard stuff. That is where the government’s interest likely sat.
The FBI notes the file covers “flying discs” specifically. That term was military jargon in the late 1940s. The Air Force used it. The documents span July 1947, right after Roswell, through July 1968. That is the peak period of Cold War UFO panic. The file includes eyewitness testimony. It includes photographic evidence from Oak Ridge. It includes proposals from inventors like Macias, who thought they could explain the phenomenon.
The declassification is partial. The FBI says the file is “the complete case file with several newly declassified pages and only minor redactions.” Minor redactions still exist. The government is not showing everything. But it is showing more than it did before.
Serial 220 is a window. It shows a government agency collecting letters from the public, cataloging them, and holding onto them for 76 years. The letter from Macias is odd. It is earnest. He wrote as a “Discoverer and Ideographic Inventor.” He believed he had something to contribute. The U.S. government filed it away. Now it is public.
The broader PURSUE archive is the real story. Serial 220 is one file among many. The government is releasing records it once kept secret. The letter from a Mexican pianist is a small part of that. But it is a concrete part. It is a name. A date. A city. A claim. It is not a rumor. It is a document.
