[Secret Agent Man]

gut says there’s a lot more than one tunnel to different israeli target cities.

[Netz]

Years ago, Synthetic Aperture Radar (SAR) was used aboard the space shuttle to see under the surface of the Earth. They discovered where former rivers once flowed, ancient archaeological sites, etc.

One would think that SAR could be used to spot tunnels, depending on the depth. Not sure about depth readings. Anybody ever hear about this technology (used by air forces) applied to tunnel hunting?