The Sky Files: The Pentagon and the Unexplained cover art
B2 · Upper Intermediate 13 min defense and securityscience and technologygovernment transparencyaerospace

The Sky Files: The Pentagon and the Unexplained

Los Archivos del Cielo: El Pentágono y lo Inexplicable
News from May 8, 2026 · Published May 9, 2026

About this episode

The U.S. Department of Defense has begun releasing classified files, images, and videos relating to unidentified flying objects. Fletcher and Octavio explore what is actually behind those images, what the technology tells us about its own limits, and why this story is more serious than it sounds.

El Departamento de Defensa de Estados Unidos ha comenzado a publicar archivos clasificados, imágenes y vídeos sobre objetos no identificados. Fletcher y Octavio exploran qué hay realmente detrás de esas imágenes, qué nos dice la tecnología sobre sus límites, y por qué esta historia es más seria de lo que parece.

Your hosts
Fletcher
Fletcher Haines
English
Octavio
Octavio Solana
Spanish
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Key Spanish vocabulary

6 essential B2-level terms from this episode, with translations and example sentences in Spanish.

SpanishEnglishExample
fenómeno phenomenon Los científicos estudian el fenómeno sin saber todavía qué lo causa.
clasificado classified (secret) Durante décadas, estos documentos permanecieron clasificados y fuera del alcance del público.
transparencia transparency La transparencia del gobierno es esencial para que los ciudadanos confíen en sus instituciones.
vulnerabilidad vulnerability La incapacidad de identificar objetos desconocidos representa una vulnerabilidad enorme para la defensa nacional.
subjuntivo subjunctive (verb mood) Es importante que usemos el subjuntivo cuando expresamos duda o posibilidad.
reconocimiento de patrones pattern recognition Los sistemas de inteligencia artificial dependen del reconocimiento de patrones para identificar amenazas.

Transcript

Fletcher EN

All right, I have to be honest with you.

When I saw this one come across the wire, my first instinct was to skip it.

Octavio ES

¿Por qué?

Why?

Es una historia importante.

It's an important story.

El Departamento de Defensa de Estados Unidos ha empezado a publicar archivos secretos, imágenes y vídeos sobre objetos no identificados.

The U.S.

Fletcher EN

Because the moment you say UFO, half the audience imagines little green men and the other half changes the channel.

But the more I read, the more I thought, wait, this is actually a story about technology and about what governments do when their sensors record something they cannot explain.

Octavio ES

Exacto.

Exactly.

Y es también una historia sobre la transparencia.

And it's also a story about transparency.

El gobierno americano ha clasificado esta información durante décadas.

The American government has classified this information for decades.

Ahora, de repente, la publica.

Now, suddenly, it publishes it.

Eso, por sí solo, ya es extraordinario.

That alone is already extraordinary.

Fletcher EN

So let's give people the ground floor.

What was actually released?

Octavio ES

El Pentágono ha publicado una serie de archivos que incluyen informes internos, imágenes de radar y vídeos grabados por pilotos militares.

The Pentagon has released a series of files that include internal reports, radar images, and videos recorded by military pilots.

Algunos de estos materiales llevan años circulando de forma no oficial, pero ahora son documentos oficiales del gobierno.

Some of this material has been circulating unofficially for years, but now it is official government documentation.

Fletcher EN

And this has been building for a while.

The real pivot point, at least from where I was sitting as a journalist, was that New York Times piece in December 2017.

That was the moment a serious news organization put its name on the claim that the Pentagon had a secret program studying these objects.

Octavio ES

Sí, el programa se llamaba AATIP, que significa Advanced Aerospace Threat Identification Program.

Yes, the program was called AATIP, which stands for Advanced Aerospace Threat Identification Program.

Era secreto, tenía financiación del Congreso, y estudiaba encuentros entre pilotos militares y objetos que se comportaban de maneras que la tecnología conocida no podía explicar.

It was secret, it had congressional funding, and it studied encounters between military pilots and objects that behaved in ways that known technology could not explain.

Fletcher EN

And the language shifted around that time too.

The government stopped saying UFO, unidentified flying object, and started saying UAP, unidentified aerial phenomena.

That's not just a branding change.

That's a signal that they were taking it seriously as a physical question, not a cultural one.

Octavio ES

Es un cambio importante.

It's an important change.

La palabra 'fenómeno' implica que algo ocurre de verdad en el cielo, algo que los sensores detectan.

The word 'phenomenon' implies that something is really happening in the sky, something that sensors detect.

No dice nada sobre qué es ese algo.

It says nothing about what that something is.

Eso es ciencia honesta.

That is honest science.

Fletcher EN

Right, and I think that's where the technology angle becomes genuinely interesting.

Because when a military pilot says something was traveling at hypersonic speed and then stopped on a dime, the question isn't whether they're lying.

The question is whether what they saw was real, or whether the sensors themselves produced a false picture.

Octavio ES

Eso es fundamental.

That's fundamental.

Los sensores modernos, los radares, las cámaras de infrarrojos, son increíblemente sofisticados, pero también pueden producir errores.

Modern sensors, radars, infrared cameras, are incredibly sophisticated, but they can also produce errors.

Un objeto puede parecer que se mueve a una velocidad imposible si la cámara cambia de ángulo en el momento equivocado.

An object can appear to move at an impossible speed if the camera changes angle at the wrong moment.

Fletcher EN

There's actually a famous case from around 2004, the USS Nimitz encounter, where multiple pilots, multiple radar systems, and a thermal camera all recorded the same object simultaneously.

That redundancy is what made investigators take it seriously.

It's much harder to explain away when four independent systems are seeing the same thing.

Octavio ES

Exacto.

Exactly.

Y ese caso es uno de los que probablemente aparecen en estos nuevos archivos.

And that case is probably one of those that appears in these new files.

Lo que me interesa es la pregunta de fondo: si no es un error tecnológico, ¿cuáles son las posibilidades reales?

What interests me is the underlying question: if it's not a technological error, what are the real possibilities?

Hay básicamente tres hipótesis.

There are basically three hypotheses.

Fletcher EN

Go ahead, lay them out.

Octavio ES

La primera: son fenómenos naturales que todavía no comprendemos bien, como plasmas atmosféricos o formas de energía que la física todavía no ha clasificado.

The first: they are natural phenomena we still don't understand well, like atmospheric plasmas or forms of energy that physics hasn't yet classified.

La segunda: son tecnología de un adversario humano, China o Rusia, más avanzada de lo que el público conoce.

The second: they are technology from a human adversary, China or Russia, more advanced than the public knows.

La tercera ya la sabes.

The third one you already know.

Fletcher EN

I do, and I'm not going to dismiss it entirely, because the honest scientific position is that you don't dismiss a hypothesis just because it's uncomfortable.

But from a national security standpoint, option two is actually the most alarming.

If China or Russia has vehicles that can operate in ways that make our entire air defense architecture obsolete, that's the real emergency.

Octavio ES

Y eso explica por qué el Congreso americano lleva años presionando para que se publique esta información.

And that explains why the American Congress has been pressing for years to have this information published.

No es curiosidad cultural, es una pregunta de defensa.

It's not cultural curiosity, it's a defense question.

¿Somos vulnerables a algo que no sabemos identificar?

Are we vulnerable to something we can't identify?

Fletcher EN

You know, I spent time embedded with NATO, and one thing that struck me is how much of military intelligence is simply about pattern recognition.

You train systems to recognize what a Russian fighter jet looks like, what a Chinese submarine sounds like.

The moment something appears that doesn't match any pattern in the library, the system just, it doesn't know what to do with it.

Octavio ES

Es una vulnerabilidad enorme.

It's an enormous vulnerability.

Y es posible que algunos de estos fenómenos sean exactamente eso: objetos diseñados para ser invisibles a los patrones conocidos.

And it's possible that some of these phenomena are exactly that: objects designed to be invisible to known patterns.

La tecnología de camuflaje activo, los materiales que absorben el radar, existen.

Active camouflage technology, materials that absorb radar, they exist.

Quizás alguien ha llegado más lejos de lo que sabemos.

Maybe someone has gone further than we know.

Fletcher EN

Let's go back historically for a second, because this isn't new.

The U.S.

Air Force ran Project Blue Book from 1952 to 1969.

They investigated over 12,000 reported sightings.

They closed it down and said, officially, there's nothing here worth investigating.

But the people who ran it, some of them, were never entirely satisfied with that conclusion.

Octavio ES

Y hay un detalle importante ahí.

And there's an important detail there.

El Proyecto Libro Azul tenía el mandato de tranquilizar al público, no de encontrar la verdad.

Project Blue Book had the mandate to reassure the public, not to find the truth.

Era una operación de relaciones públicas tanto como una investigación científica.

It was a public relations operation as much as a scientific investigation.

Es comprensible en el contexto de la Guerra Fría, pero deja un legado de desconfianza.

That's understandable in the Cold War context, but it leaves a legacy of distrust.

Fletcher EN

Which is exactly why the 2017 revelations landed so hard.

Because the message was, we weren't just not investigating this, we were actively running a classified program to investigate it while publicly pretending there was nothing to investigate.

That gap is what broke trust with a lot of people, and honestly, I get it.

Octavio ES

Sí.

Yes.

Y en 2023, un ex oficial de inteligencia llamado David Grusch testificó ante el Congreso bajo juramento que Estados Unidos tiene programas secretos para recuperar y estudiar materiales de origen no humano.

And in 2023, a former intelligence officer named David Grusch testified before Congress under oath that the United States has secret programs to recover and study materials of non-human origin.

Eso es una afirmación enorme.

That is an enormous claim.

No ha sido confirmada, pero tampoco ha sido refutada oficialmente.

It hasn't been confirmed, but it hasn't been officially refuted either.

Fletcher EN

I mean, testifying under oath is not nothing.

You go to prison for lying to Congress.

Whether you believe Grusch or not, the fact that a career intelligence officer was willing to put his name and his liberty behind that claim, that's worth noting.

Octavio ES

Exactamente.

Exactly.

Y esto nos lleva al presente.

And this brings us to the present.

Estos archivos que el Pentágono publica ahora, ¿son una respuesta a esa presión política?

These files the Pentagon is releasing now, are they a response to that political pressure?

¿O es algo más grande?

Or is it something bigger?

La pregunta es si lo que publican es realmente todo lo que tienen, o solo lo que están dispuestos a mostrar.

The question is whether what they're publishing is really everything they have, or only what they're willing to show.

Fletcher EN

Thirty years covering governments in three different continents, and I can tell you, partial disclosure is sometimes more destabilizing than full silence.

Because it invites everyone to fill in the blanks, and people fill blanks with whatever they're already inclined to believe.

Octavio ES

Totalmente de acuerdo.

Totally agree.

Y hay algo más que me parece importante: la tecnología de detección ha mejorado enormemente en los últimos veinte años.

And there's something else I think is important: detection technology has improved enormously in the last twenty years.

Los aviones de combate modernos tienen sensores mucho más sofisticados que los de los años noventa.

Modern combat aircraft have much more sophisticated sensors than those of the nineties.

Eso significa que estamos detectando más cosas, no necesariamente que haya más cosas ahí fuera.

That means we're detecting more things, not necessarily that there are more things out there.

Fletcher EN

That's a really important distinction.

More data doesn't equal more phenomena.

It might just mean we're finally able to see things that were always there but our instruments couldn't catch.

Octavio ES

Piénsalo: antes de que existiera el radar moderno, ¿cómo habrías documentado un objeto que se mueve a velocidades extremas?

Think about it: before modern radar existed, how would you have documented an object moving at extreme speeds?

No podrías.

You couldn't.

Ahora tienes radar multifuncional, cámaras de infrarrojos, sensores de electroóptica.

Now you have multifunctional radar, infrared cameras, electro-optical sensors.

Puedes capturar cosas que antes eran invisibles para la tecnología.

You can capture things that were previously invisible to technology.

Fletcher EN

There's also the drone angle, which I don't think gets enough attention.

Commercial drone technology has advanced so fast that things which would have seemed physically impossible to a 1990s radar operator are now achievable with off-the-shelf hardware.

Some of what people are seeing might genuinely be the civilian drone industry catching the military off guard.

Octavio ES

Es una posibilidad real.

That's a real possibility.

Y también existe el problema de los llamados 'enjambres de drones', grupos coordinados de drones pequeños que pueden aparecer en el radar como un solo objeto grande que se mueve de manera extraña.

And there's also the problem of so-called 'drone swarms', coordinated groups of small drones that can appear on radar as a single large object moving in a strange way.

Hay incidentes documentados cerca de bases militares americanas que probablemente tienen esa explicación.

There are documented incidents near American military bases that probably have that explanation.

Fletcher EN

Which brings up something that I think gets buried in all the noise around this story.

Even if every single one of these incidents has a mundane explanation, the fact that the military couldn't identify them in real time is still a serious problem.

That's still a gap in situational awareness.

That's still a threat.

Octavio ES

Completamente.

Completely.

Y el Pentágono creó la AARO, que es la Oficina de Resolución de Anomalías en Todos los Dominios, precisamente para eso.

And the Pentagon created AARO, the All-domain Anomaly Resolution Office, precisely for that.

No para encontrar extraterrestres, sino para garantizar que ningún objeto que viole el espacio aéreo de Estados Unidos quede sin identificación.

Not to find extraterrestrials, but to ensure that no object that violates U.S.

Es una función de seguridad básica.

airspace goes unidentified.

Fletcher EN

And that's what I want listeners to take away from this.

You can be completely skeptical about the more exotic interpretations and still recognize that this release represents something genuinely significant.

For the first time, the most powerful military in the world is saying, publicly, here are things we recorded and cannot explain.

That's a remarkable admission.

Octavio ES

Y eso es lo que hace que esta historia sea importante más allá de los titulares sensacionalistas.

And that's what makes this story important beyond the sensational headlines.

No es ciencia ficción.

It's not science fiction.

Es una pregunta real sobre los límites del conocimiento humano y sobre lo que los gobiernos hacen con la incertidumbre.

It's a real question about the limits of human knowledge and about what governments do with uncertainty.

Fletcher EN

Governments are constitutionally bad at communicating uncertainty.

They're trained to project confidence even when they have none.

So when an institution like the Pentagon says, we don't know, that's almost as startling as anything in the files themselves.

Octavio ES

En ciencia, la honestidad sobre la ignorancia es un valor.

In science, honesty about ignorance is a value.

Decir 'no lo sabemos todavía' es el punto de partida del conocimiento.

Saying 'we don't know yet' is the starting point of knowledge.

Pero en la política y en la seguridad nacional, esa misma honestidad puede crear pánico.

But in politics and national security, that same honesty can create panic.

Por eso estos archivos son tan interesantes: es el momento en que la burocracia choca con la realidad.

That's why these files are so interesting: it's the moment when bureaucracy collides with reality.

Fletcher EN

Okay, one more thing before we wrap up.

I kept noticing, when you said 'es posible que alguien haya llegado más lejos de lo que sabemos,' you used that particular verb construction.

The 'haya llegado' part.

Octavio ES

Sí, es el subjuntivo.

Yes, it's the subjunctive.

Cuando expresas posibilidad o duda, en español usas el subjuntivo después de 'es posible que'.

When you express possibility or doubt, in Spanish you use the subjunctive after 'es posible que'.

No dices 'es posible que alguien ha llegado', eso sonaría raro para un hablante nativo.

You don't say 'es posible que alguien ha llegado', that would sound strange to a native speaker.

Dices 'es posible que alguien haya llegado'.

You say 'es posible que alguien haya llegado'.

Fletcher EN

So the subjunctive is basically Spanish's way of flagging that what follows is not a fact, it's a possibility, a wish, a doubt.

English just kind of, we muddle through with context.

Octavio ES

Exactamente.

Exactly.

Fíjate en la diferencia: 'Creo que China tiene esa tecnología', indicativo, afirmación directa.

Notice the difference: 'I think China has that technology', indicative, direct statement.

'Es posible que China tenga esa tecnología', subjuntivo, posibilidad.

'It's possible that China has that technology', subjunctive, possibility.

El modo verbal cambia el significado de forma muy precisa.

The verb mood changes the meaning very precisely.

En inglés esa diferencia a veces se pierde.

In English that difference is sometimes lost.

Fletcher EN

That's actually perfect for this episode's topic.

The subjunctive is the grammar of uncertainty.

And uncertainty is basically the whole story.

Octavio ES

No había pensado en eso, pero tienes razón.

I hadn't thought of it that way, but you're right.

Es posible que el subjuntivo sea el tiempo verbal más apropiado para hablar de ovnis.

It's possible that the subjunctive is the most appropriate verb mood for talking about UFOs.

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