How a UAP reaches the State Department, a Mexico City diplomatic cable

Mikey · 21 May 2026

THE DOCUMENT

State Department cable 23 MEXICO 2544, “Mexico: Weekly Political Blotter, Sep 11-15”, sent from the US Embassy in Mexico City to the State Department in Washington on 16 September 2003. Released in full by the US Department of State on 25 February 2026 and published in PURSUE Release 01.

What this briefing is

The earlier briefings in this series have worked with military paperwork: mission reports, Range Fouler debriefs, the dry after-action language of aircrew. This briefing looks at a different route entirely. It takes one US diplomatic cable and asks a narrow question. When a UAP event happens overseas and is not seen by a US aircrew, how does word of it reach Washington at all?

The answer, in this case, is the State Department. The document is a single cable. It is short, it is mundane, and the UAP material in it occupies one paragraph out of eleven. That is exactly why it is worth reading. It shows the ordinary diplomatic plumbing through which a foreign UAP event becomes a US government record.

A note on the date. The cable header carries two years. The document itself is from 2003, but the message reference number reads “23 MEXICO 2544” and the date line reads “Sep 16, 2023”. The body of the cable describes events of September 2023: the MORENA presidential selection, the 2024 Mexican election cycle, and the Mexican Congress hearing of 12 September 2023. The “2003” in some catalogue listings appears to be a transcription artefact. This briefing treats the cable as a 2023 document, because its own contents place it there unambiguously.

TL;DR

On 16 September 2023 the US Embassy in Mexico City sent a routine weekly political summary to the State Department. The cable is titled “Mexico: Weekly Political Blotter, Sep 11-15”. It is a digest of seven domestic political stories, ranging from a party leadership dispute to the killing of prosecutors in Guerrero. The eighth and final item, paragraph 11, is headed “Mexican Congress Hears Testimony on Alien Life”.

That paragraph reports that on 12 September 2023 the Mexican Congress “heard testimony on unidentified aerial phenomenon (UAP)” from witnesses including the journalist Jaime Maussan and the former US Navy pilot Ryan Graves. The cable notes that two alleged “alien corpses” were presented, that Graves was disappointed by the spectacle, and that “scientists have discredited previous alleged alien corpses Maussan presented as evidence of alien life”.

This is evidence tier 2: a primary document. It is an authentic US government record. What it documents, though, is not a UAP sighting. It is a US embassy reporting on a foreign legislature’s hearing. The distinction matters, and most of this briefing is about keeping it clear.

What a diplomatic cable is, and how to read this one

A State Department cable is the standard written message format used between US embassies and Washington. The header of this one is worth decoding, because the routing tells the story.

The “MRN”, message reference number, is 23 MEXICO 2544, the 2,544th cable Mission Mexico sent that year. “From: AMEMBASSY MEXICO” identifies the sending post. “Action: WASHDC, SECSTATE Routine” means the cable is addressed to the Secretary of State in Washington, with “Routine” precedence, the lowest urgency tier. Nothing in this cable was treated as a priority.

The “E.O: 13526” line is the same executive order on classification seen in the military files in this release. The “TAGS” line carries subject codes: “PGOV” for internal government and politics, “PREL” for political relations, “ASEC” for security, and notably “TSPA”, the State Department tag for space activities. The presence of TSPA is the single clue in the header that the cable touches on aerial or space matters at all.

The classification markings are the clearest tell of how the embassy regarded the contents. Most paragraphs are marked “(SBU)”, Sensitive But Unclassified, the routine handling caveat for ordinary diplomatic reporting. The UAP paragraph, paragraph 11, is marked “(U)”, Unclassified. So is its heading. The embassy treated the alien-life item as the least sensitive thing in the cable. There was nothing secret about it, because it was a report of a public hearing.

What the cable actually says about the hearing

The relevant text is paragraph 11, quoted in full from the document:

“Congress heard testimony on unidentified aerial phenomenon (UAP) September 12, from experts including from Mexican journalist Jaime Maussan and former U.S. Navy pilot Ryan Graves, who previously testified before the U.S. Congress. The hearing was to debate language on UAP in the Aerial Space Protection Law which, if approved, would make Mexico the first country to formally acknowledge the presence of alien life on Earth. Experts asked legislators to recognize UAP, guarantee airspace security, and allow UAP to be studied. Experts also presented to Congress two alleged alien corpses and videos of Mexican pilots’ encounters with fast-moving flying objects during flight.”

The next paragraph adds the embassy’s framing of the aftermath. After the hearing, Graves “lamented the display took away from his and other pilots’ experiences with UAP and expressed disappointment with Maussan’s ‘unsubstantiated stunt’.” The cable closes the item with a flat sentence: “Scientists have discredited previous alleged alien corpses Maussan presented as evidence of alien life.”

The embassy is doing something specific here. It reports the event neutrally, it names the witnesses, it states what was asked of the legislators, and then it draws a clear line between two things that the hearing presented together. On one side, the testimony of a former Navy pilot about pilots’ encounters. On the other, the “alleged alien corpses” and the “unsubstantiated stunt”. The cable does not endorse either. It records that the credible witness himself objected to being staged alongside the corpses, and it notes that the corpses had a prior history of being discredited. This is a drafter being careful.

How a UAP event reaches Washington this way

The value of this document is procedural, so it is worth stating the route plainly.

A UAP event, here a foreign legislature publicly debating UAP, occurs overseas. A US embassy in that country observes it, the same way it observes elections, court cases and security incidents. The embassy is not investigating the UAP question. It is doing ordinary political reporting, summarising what happened in the host country that week. The UAP item is folded into a routine digest, the “Political Blotter”, as one bullet among eight.

The cable is then transmitted to the State Department in Washington at Routine precedence. From the “Info” and “XMT” lines at the end of the document, the same cable was also copied to a wide standing distribution: the National Security Council, the Office of the Vice President, the Director of National Intelligence, the CIA, the DIA, US Northern Command, the Department of Homeland Security, the Department of Justice, US Southern Command, and all US consulates in Mexico. None of that distribution was chosen because of the UAP paragraph. It is the standard list for a Mexico political blotter. The UAP item simply travelled along with everything else.

That is the quiet point of this briefing. A UAP event entered the US government’s records here not because anyone decided it was important, but because it happened in a country an embassy was already watching, and the embassy reported its week as usual. Military UAP reports, the MISREPs and Range Fouler debriefs elsewhere in this release, are generated by the encounter itself. A diplomatic cable like this one is generated by the calendar. The UAP content is incidental to why the document exists.

What it reliably establishes

It establishes that the US Embassy in Mexico City was aware of, and formally reported to Washington, the Mexican Congress hearing on UAP held on 12 September 2023. The hearing itself is a matter of public record, but this cable is independent, contemporaneous, official US confirmation that it took place and roughly what occurred at it.

It establishes the embassy’s own characterisation of that hearing. The drafters distinguished the testimony of a former US Navy pilot from the presentation of “alleged alien corpses”, described the latter through Graves’s words as an “unsubstantiated stunt”, and noted that earlier such corpses had been “discredited”. For anyone studying how US officials privately framed the 2023 Mexican hearing, that framing is the document’s most useful content.

It establishes the mechanism. It is a clean, datable example of how a UAP-related event overseas becomes a US government record through diplomatic rather than military channels: as a routine line item in routine political reporting, distributed on a standard list, marked Unclassified.

What it does not establish

It does not establish that anything anomalous occurred. The cable reports a legislative hearing, not a sighting. The only first-hand UAP material referenced in it, the “videos of Mexican pilots’ encounters”, is described second hand, as something shown to the hearing, and the cable offers no assessment of it.

It does not lend any US government weight to the “alien corpses”. The opposite is true. The cable goes out of its way to record that those specimens had been discredited and that the credible witness present objected to them. Reading this document as the State Department acknowledging alien remains would be a serious misreading. It records scepticism, not endorsement.

It does not show special US interest in the UAP question. The item is one bullet of eight, marked Unclassified, sent at Routine precedence, on a generic distribution list. The cable’s structure indicates the embassy treated it as ordinary political news, no more weighty than a mayoral campaign launch reported two paragraphs earlier.

And it does not establish anything about events outside Mexico. This is a single post reporting on a single host-country hearing on a single week. Its worth is as one clear specimen of a reporting channel, not as evidence about the phenomenon itself.

Related wiki entries

The wiki entries below give background on the people, programmes and document types behind this briefing.

PURSUE · Department of War · Executive Order 13526 · Ryan Graves

References and further reading

• Primary document: State Department cable 23 MEXICO 2544, “Mexico: Weekly Political Blotter, Sep 11-15”, US Embassy Mexico City, 16 September 2023, released in full 25 February 2026, hosted at war.gov
• Presidential Unsealing and Reporting System for UAP Encounters, U.S. Department of War, war.gov/ufo
• Briefing 1 in this series, on PURSUE Release 01 as a whole, for the evidence tier system and the State Department cable family
• Background: the Mexican Congress UAP hearings of September 2023, contemporary press coverage, for the public record this cable reports against