A downed US airman in hostile territory was found not by sight or sound, but by the faint rhythm of his own heartbeat. In a mission wrapped in secrecy, the Central Intelligence Agency (CIA) used a tool never deployed before to bring him home.
The device, known as 'Ghost Murmur,' has quickly drawn both admiration and unease. It signals a shift in how search and rescue missions may be carried out in the future.
