The Pentagon has a laser that identifies people by their heartbeat | Engadget
New Laser Can Identify People From a Distance By Their Heartbeat
Pentagon tool reads 'cardiac signature' to identify people at range | E&T Magazine
Orange Neon Glowing Laser Heartbeat Heart Pulse Diagram Curved Line on Grunge Blue Concrete Reflective Floor Roof Sci Fi Modern Stock Illustration - Illustration of glow, lights: 135424285
The Pentagon's new heartbeat detection laser could save us from our surveillance horror
PDF] Development of laser-based heart sound detection system | Semantic Scholar