Fortress Israel

Israel's last war with Hamas in 2014, lasted 51 days,  an extremely long time for Israeli anti-terror conflicts as the Netanyahu government concerned itself with finding and destroying Hams tunnels. In all the IDF destroyed more than 30 terror tunnels into Israel.

This week the Israelis found another such tunnel and destroyed it. As with the missile threat from Hezbollah, those clever Jews have invented a technology to confront this new threat:

The technology, which was developed by an Israeli company and is similar to the one used for the aforementioned underground anti-tunnel obstacle, relies on extremely sensitive sensors, but still manages to overcome one of the main weak points of its predecessors—the reliability of the data interpreted from its sensors.
Since the border area is full of heavy vehicles moving daily in the area, from armored personnel carriers and IDF tanks to farmers' combine tractors, suspicious signals were picked up over the years by sensors deployed in the area, but ultimately proved to be false—caused by the movement of vehicles on the ground.

How wonderfully vague.

There is also this:

In tandem with the new technology, the IDF has been working on the new underground obstacle, which costs NIS 4 billion, and does almost all of the work to neutralize tunnels.

First, it physically blocks tunnels using a thick concrete wall that penetrates deep below ground while identifying when they are being dug with sensitive detectors. After identifying the tunnels’ weak points and cavities it automatically destroys the enemy tunnel by pumping them with liquid cement.

The idea of Hamas terrorists drowning in a pool of cement makes us laugh. The Israelis became bond villains so gradually we hardly noticed.

In the beginning Israel survived on professionalism, grit and daring. Now technology sees them through. In the last decade they've developed anti-missile systems for tanks, for short range rockets and even ballistic missiles. Now they have a tunnel detecting system that can differentiate between a jack hammer and a tractor.

Israel has walls above ground and soon below ground.

All they need is a mote.