One Heartbeat, One Target: The Classified Tool Behind a Daring Iran Rescue

One Heartbeat, One Target: The Classified Tool Behind a Daring Iran Rescue

Early in the year, I reviewed reports that a Venezuelan guard who managed to survive the raid on Maduro’s compound said that U.S. forces used an intense sound‑like weapon, describing it as a powerful “sonic weapon” that instantly incapacitated defenders.

Now another intriguing report has been issued about new technology used, this time to rescue the airman missing from the F-15 downed in Iran.

“Ghost Murmur” is reported to be a classified CIA sensing system that helped locate the airman hiding in mountainous terrain in Iran by remotely detecting his heartbeat.

The secret technology uses long-range quantum magnetometry to find the electromagnetic signal of a human heartbeat and pairs the data with artificial intelligence software to isolate the signature from background noise, two sources close to the breakthrough said.

It was the tool’s first use in the field by the spy agency — and was alluded to Monday afternoon by President Trump and CIA Director John Ratcliffe at a White House briefing.

“It’s like hearing a voice in a stadium, except the stadium is a thousand square miles of desert,” a source briefed on the program told The Post. “In the right conditions, if your heart is beating, we will find you.”

This source and another with knowledge of Lockheed Martin intelligence collection tools told The Post that Ghost Murmur was developed by Skunk Works, the aerospace giant’s secretive advanced development division. The company declined to comment.

The technology appears to be a combination of biology coupled with artificial intelligence.

The human heart does generate a weak electromagnetic field which could be considered a biometric signal. In theory, it may be possible for Ghost Murmur to identify heartbeats via this electromagnetic field.

To do this, it likely uses NV-centre diamond sensors. This refers to a tiny defect in a synthetic diamond crystal, which is incredibly sensitive to magnetic fields.

It seems that after identifying this signature, the AI can then isolate it from the environment, making it possible to locate an individual. But it is unclear how the device can successfully isolate a single heartbeat in a region, and the distance from which it can make such detections.

However, many knowledgeable about physics and magnetism are skeptical that the pilot was located via the heart’s weak electrical signal, which is on the order of 10–100 picotesla, only a few centimeters from the chest. That reading is already far weaker than Earth’s magnetic field and rapidly drops off with distance, making detection at distances of tens of miles extraordinarily difficult, even with advanced quantum magnetometers.

Additionally, while sensitive instruments can measure such tiny fields in tightly controlled lab settings at short range, scaling this to operational battlefield conditions with significant clutter, noise, and attenuation has not been demonstrated and likely requires orders of magnitude more capability than publicly known technology.

Ghost Murmur is much more like hype layered on top of genuine sensor science than like a demonstrated operational. The heart’s magnetic field starts out tiny. Reviews put the human heart’s peak field at only about 10–100 pT at roughly 3 cm above the chest. That is already (1/n) https://t.co/8XTBMCfdGX

— NEUTRINO (@ETERNALPHYSICS) April 8, 2026

Interestingly, diamond-based quantum sensors are becoming more sensitive and easier to use.

In Non-invasive magnetocardiography of a living rat based on a diamond quantum sensor, researchers used a similar approach to measure the heartbeat of a living rat. The system worked at room temperature and avoided bulky cooling equipment, a step toward more practical devices. Still, the sensor had to be placed very close to the body, and the setup remained tightly controlled to avoid interference. In this case, the technology works on real biological systems, but only at close range and under controlled conditions.

In a 2025 study, Performance Evaluation of a Diamond Quantum Magnetometer for Biomagnetic Sensing, researchers examined how well these sensors could detect signals like those from the heart or brain. The results show that quantum sensors are becoming more sensitive and easier to operate, especially since they can work at room temperature. But the study also highlights a key hurdle: background noise from the environment still makes reliable detection difficult outside controlled settings. The takeaway here is that hardware is improving, but real-world conditions remain a major obstacle.

These studies do not conclude that it would be impossible to detect a heartbeat in a desert environment, but they do suggest that the type of device described in media accounts would be vastly superior to current disclosed art.

There may be additional components to the rescue device that are not publicly known.

An anonymous source told The Post the swathe of Iran where the airman was sheltering was “about as clean an environment as you could ask for,” with few other people in the area and little to interfere with the new tactics.

The Ghost Murmur works “best in remote, low-clutter environments,” this person said.

Trump said the airman, currently identified only as a colonel, had used a “very sophisticated beeper-type apparatus” U.S. military personnel carry to communicate his location from the mountain ridgeline.

U.S. officials identified the device as the Combat Survivor Evader Locator (CSEL), made by defense giant Boeing.

Aircrew and special forces have been using this device to survive when stranded since 2009. Boeing describes the CSEL as a “global 911 emergency call system for downed personnel.”

The full truth about “Ghost Murmur” will likely remain buried under classification stamps for years. That said, it is heartening that, whatever mix of tools was actually used, an American pilot is alive, out of Iran, and back in friendly hands. This is the result that truly matters.

Donations tax deductible
to the full extent allowed by law.