The Pentagon has a laser that can identify people from a distance, by their heartbeat. You will be identified even if you cover your face. Everyone’s heart is different. Like the iris or fingerprint, our unique cardiac signature can be used as a way to tell us apart. Crucially, it can be done from a distance. The Pentagon developed a device called ‘Jetson’ that can identify people without seeing their face: instead, it detects their unique cardiac signature with an infrared laser. How does this work? Contact infrared sensors work by detecting the changes in the reflection of infrared light caused by bloodflow. By contrast, the new device, called Jetson, uses a technique known as laser vibrometry to detect the surface movement caused by the heartbeat. This works thoughtypical clothing like a shirt and a jacket. Note: The Pentagon is planning to deploy this technology in the middle-east countries where woman covers their faces with a veil. Even if you cover your face entirely, you will be identified.