4438 () posted 259 days ago by stevejobs871 259 days ago by stevejobs871 +4438 / -0 232 comments share 232 comments share save hide report block hide child comments Comments (232) sorted by: top new old worst You're viewing a single comment thread. View all comments, or full comment thread. ▲ 10 ▼ – Magaman_2 10 points 259 days ago +11 / -1 Cartels are very well-funded. I bet they put seismic sensors in the wall tho. permalink save report block reply ▲ 9 ▼ – ModernKnight 9 points 259 days ago +9 / -0 Seismic sensors are fantastic tools for detecting when and where tunnels are being dug. If they are sensitive enough they will even tell when there is foot traffic moving through established, even concrete floored, tunnels. They're fantastic. permalink save report block reply ▲ 3 ▼ – deleted 3 points 258 days ago +3 / -0
Cartels are very well-funded. I bet they put seismic sensors in the wall tho.
Seismic sensors are fantastic tools for detecting when and where tunnels are being dug. If they are sensitive enough they will even tell when there is foot traffic moving through established, even concrete floored, tunnels. They're fantastic.