Overview
At 08:45 on 16 March 1967, all ten Minuteman I missiles of Echo Flight at Malmstrom Air Force Base in Montana dropped off strategic alert within seconds of each other. The Air Force's own unit history records it plainly: every site in the flight went to a No-Go condition.
That much is documented and has never been disputed by anyone. What is disputed is everything around it — whether anything was in the sky, whether the shutdown had an external cause, and, since June 2025, whether the government has known the answer the whole time.
What the engineers found
The Air Force did not treat the outage as trivial. Ten missiles failing simultaneously is a strategic problem regardless of what caused it, and the investigation was correspondingly serious: testing at Malmstrom, at Ogden Air Materiel Area, and at Boeing's plant in Seattle.
The finding was that an electronic noise pulse had done it, and that the component of the Minuteman I most vulnerable to such a pulse was the logic coupler in the guidance and control system. A Boeing engineer was able to reproduce the failure on a bench, shutting the system down by injecting a signal of the right character.
So the mechanism was established. The source was not. The investigation could say what kind of thing had happened without saying what had produced it, and generating a pulse capable of penetrating a hardened, buried system with 1967 equipment would have required apparatus that was neither small nor portable.
That gap — a confirmed mechanism with no confirmed source — is the space the theory has occupied for nearly sixty years.
The witness account
The best-known claim comes from Robert Salas, then a twenty-six-year-old deputy missile combat crew commander. His account, given publicly from the mid-1990s onward, is that a security guard telephoned him underground to report objects manoeuvring above the site, then called back about a glowing red object hovering over the front gate, and that the missiles began going to No-Go within minutes.
The Air Force document covering Echo Flight addresses this directly and dismisses it: rumours of unidentified flying objects around the flight at the time of the fault, it says, were disproven.
Salas has said his own incident was at Oscar Flight rather than Echo, which is where a good deal of the argument now lives. Critics note that the details of his account — which flight, which date — have not been consistent across tellings, and that no unit record documents a comparable Oscar Flight shutdown. Supporters note that a crew officer recalling a classified event decades later is exactly the witness whose memory would blur on dates while holding on the thing that frightened him.
Neither observation settles it. Both are fair.
The 2010 press conference
The claims moved from ufology into general news coverage on 27 September 2010, when seven former Air Force officers appeared at the National Press Club in Washington and described incidents at nuclear sites, calling on the government to acknowledge them. The event was organised by the researcher Robert Hastings, who had spent decades collecting such accounts.
The press conference did not produce new documents. What it produced was a change in register: named former officers with security clearances, speaking on the record, in a venue built for credibility. Much of the theory's mainstream traction dates from that afternoon rather than from anything in the archives.
The wider pattern
Malmstrom is the centre of the theory but not the whole of it, and the surrounding cases are of a different and weaker kind.
The most substantial is the autumn of 1975, when a series of unidentified low-flying objects were reported over Strategic Air Command bases in the northern United States — Loring in Maine, Wurtsmith in Michigan, Malmstrom again, Minot in North Dakota. Message traffic about the overflights was released under FOIA and is not in dispute; the bases went to heightened security and could not identify what they were tracking.
Those records show unexplained incursions over nuclear installations. They do not show weapons being disabled. Merging the two — the 1975 overflights and the 1967 shutdown — into a single pattern is the step that produces the theory in its familiar form, and it is a step the documents themselves do not take.
The 2024 acknowledgement
In March 2024 the Pentagon's All-domain Anomaly Resolution Office published the first volume of its historical review of government involvement with unidentified anomalous phenomena. It identified, as one of the significant recurring narratives it had to address, the claim that sightings near nuclear facilities caused missile malfunctions or power failures.
Naming a narrative is not endorsing it. But it did move the subject inside the perimeter — the Pentagon was now writing about Malmstrom in its own historical record rather than declining to.
The 2025 explanation, and the objections to it
In June 2025 the Wall Street Journal published an account, drawing on AARO's work, arguing that Cold War officials had deliberately allowed and sometimes encouraged UFO stories to grow around classified programmes. Malmstrom appeared in it specifically: the shutdown, on this account, was caused by an unannounced electromagnetic pulse test, and the "UFO" was part of the same event.
This is the first time the missing source has been supplied by an official channel, and it is consistent with the Boeing finding — a noise pulse, from a deliberate emitter nobody had told the crews about.
It has also drawn substantial and specific objections, and they are not all from believers.
The first is chronological. The transportable EMP simulator usually identified as the candidate system was not proposed for design and development until 1971, four years after the incident, and was still in development in 1973. If the test happened, it was not run with that equipment.
The second is technical. Electromagnetic pulse effects on hardened electronics tend to be destructive rather than temporary — components fail and are replaced. The Echo Flight missiles were restored to alert, which is a different signature.
The third is procedural. An unannounced EMP test that disabled ten armed nuclear missiles during a period of high alert would itself have been a serious incident, and would be expected to leave its own paper trail.
Where this leaves it
Three things are solidly established: the shutdown happened, the Air Force found a noise pulse and could reproduce the failure, and it never publicly identified what emitted the pulse. Everything else is contested.
What is unusual about this case is the direction the argument has moved. For fifty years the sceptical position was that a technical fault had been dressed up as a UFO. The official explanation offered in 2025 is closer to the theorists' structure than to that — an unacknowledged programme, a real external cause, and crews left with an experience nobody would explain to them. It differs on the identity of the thing in the sky, not on whether something was concealed.
That may be why the 2025 account has satisfied so few people on either side. It confirms the secrecy while removing the mystery, and it arrives with a dating problem it has not yet answered.