WIRED: How Underground Fiber Optics Spy on Humans Moving Above

[grarpamp]

> https://www.wired.com/story/how-underground-fiber-optics-spy-on-humans-moving-above

https://www.timesofisrael.com/how-the-tunnels-in-gaza-are-dug-and-detected/
https://www.remsdaq.com/solutions/integrated-security-systems/perimeter-intrusion-detection-systems-pids/sabreline-buried-pressure-sensors/
https://www.sciencedirect.com/science/article/abs/pii/092442479187014T
https://ui.adsabs.harvard.edu/abs/1999SPIE.3852..106K/abstract
https://science.sciencemag.org/content/371/6532/931